900 (number)
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Nine hundred is the natural number following eight hundred ninety-nine and preceding nine hundred one. It is the square of 30 and a Harshad number.
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| Ordinal | Nine hundred | ||
| Cardinal | 900th | ||
| Factorization | <math>2^2 \cdot 3^2 \cdot 5^2<math> | ||
| Roman numeral | CM | ||
| Binary | 1110000100 | ||
| Hexadecimal | 384 | ||
Nine hundred is also:
- The telephone area code for "premium" phone calls in the North American Numbering Plan: see 900 number.
- In Greek number symbols Sampi ("Great Pi" ostensibly from the visual resemblance to the greek letter), which is signified by a convex horisontal arc with two parallel vertical lines below. Sometimes represented in a slightly tilted form.
- For the year AD, see 900.
901 = 17 × 53
902 = 2 × 11 × 41, sphenic number, nontotient, Harshad number, also the telephone area code for Nova Scotia and Prince Edward Island
903 = 3 × 7 × 43, sphenic number, triangular number, Mertens function(903) returns 0
904 = 23 × 113 or 113x8, Mertens function(904) returns 0
905 = 5 × 181, sum of seven consecutive primes (109 + 113 + 127 + 131 + 137 + 139 + 149)
906 = 2 × 3 × 151, sphenic number, Mertens function(906) returns 0
907 prime number, also the telephone area code for Alaska
908 = 22 × 227, nontotient
909 = 32 × 101
910 = 2 × 5 × 7 × 13, Mertens function(910) returns 0, Harshad number
911 has its own page
912 = 24 × 3 × 19, sum of four consecutive primes (223 + 227 + 229 + 233), sum of ten consecutive primes (67 + 73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109), Harshad number. In the Stonecutters episode of The Simpsons, Lenny told Homer the real emergency number is 912.
913 = 11 × 83, Smith number, Mertens function(913) returns 0. After escaping the Jedi purge, Obi-Wan Kenobi transmitted a 913 emergency transmission.
914 = 2 × 457, nontotient
915 = 3 × 5 × 61, sphenic number, Smith number, Mertens function(915) returns 0, Harshad number
916 = 22 × 229, Mertens function(916) returns 0, nontotient
917 = 7 × 131, sum of five consecutive primes (173 + 179 + 181 + 191 + 193)
918 = 2 × 33 × 17, Harshad number
919 prime number, cuban prime, palindromic prime, centered hexagonal number, Mertens function(919) returns 0
920 = 23 × 5 × 23, Mertens function(920) returns 0
921 = 3 × 307
922 = 2 × 461, nontotient, Smith number
923 = 13 × 71
924 = 22 × 3 × 7 × 11, sum of a twin prime (461 + 463)
925 = 52 × 37, centered square number, the millesimal fineness number for Sterling silver
926 = 2 × 463, sum of six consecutive primes (139 + 149 + 151 + 157 + 163 + 167), nontotient
927 = 32 × 103, tribonacci number
928 = 25 × 29, sum of four consecutive primes (227 + 229 + 233 + 239), sum of eight consecutive primes (101 + 103 + 107 + 109 + 113 + 127 + 131 + 137)
929 prime number, palindromic prime, sum of nine consecutive primes (83 + 89 + 97 + 101 + 103 + 107 + 109 + 113 + 127)
930 = 2 × 3 × 5 × 31, pronic number
931 = 72 × 19, sum of three consecutive primes (307 + 311 + 313)
932 = 22 × 233
933 = 3 × 311
934 = 2 × 467, nontotient
935 = 5 × 11 × 17, sphenic number, Harshad number
936 = 23 × 32 × 13, pentagonal pyramidal number, Harshad number
937 prime number, star number
938 = 2 × 7 × 67, sphenic number, nontotient
939 = 3 × 313
940 = 22 × 5 × 47
941 prime number, sum of three consecutive primes (311 + 313 + 317), sum of five consecutive primes (179 + 181 + 191 + 193 + 197)
942 = 2 × 3 × 157, sphenic number, sum of four consecutive primes (229 + 233 + 239 + 241), nontotient
943 = 23 × 41
944 = 24 × 59, nontotient
945 = 33 × 5 × 7, double factorial of 9, smallest odd abundant number (divisors less than itself add up to 975)
946 = 2 × 11 × 43, sphenic number, triangular number, hexagonal number
947 prime number, sum of seven consecutive primes (113 + 127 + 131 + 137 + 139 + 149 + 151)
948 = 22 × 3 × 79, nontotient
949 = 13 × 73
950 = 2 × 52 × 19, nontotient, also one of two ISBN Group Identifiers for books published in Argentina
951 = 3 × 317, centered pentagonal number, also one of two ISBN Group Identifiers for books published in Finland
952 = 23 × 7 × 17
- 952 is also 9-5-2, a card game similar to bridge.
- one of two ISBN Group Identifiers for books published in Finland
953 prime number, Sophie Germain prime, centered heptagonal number, also ISBN Group Identifier for books published in Croatia
954 = 2 × 32 × 53, sum of ten consecutive primes (73 + 79 + 83 + 89 + 97 + 101 + 103 + 107 + 109 + 113), nontotient, Harshad number, also ISBN Group Identifier for books published in Bulgaria
955 = 5 × 191, also ISBN Group Identifier for books published in Sri Lanka
956 = 22 × 239, also ISBN Group Identifier for books published in Chile
957 = 3 × 11 × 29, sphenic number, also one of two ISBN Group Identifiers for books published in Taiwan and China
958 = 2 × 479, nontotient, Smith number, the ISBN Group Identifier for books published in Colombia, the millesimal fineness number for Britannia silver
959 = 7 × 137, also ISBN Group Identifier for books published in Cuba
960 = 26 × 3 × 5, sum of six consecutive primes (149 + 151 + 157 + 163 + 167 + 173), Harshad number, also ISBN Group Identifier for books published in Greece
961 = 312, sum of three consecutive primes (313 + 317 + 331), sum of five consecutive primes (181 + 191 + 193 + 197 + 199), centered octagonal number, also ISBN Group Identifier for books published in Slovenia
962 = 2 × 13 × 37, sphenic number, nontotient, also one of two ISBN Group Identifiers for books published in Hong Kong
963 = 32 × 107, sum of the first twenty-four primes, also ISBN Group Identifier for books published in Hungary
964 = 22 × 241, sum of four consecutive primes (233 + 239 + 241 + 251), nontotient, also ISBN Group Identifier for books published in Iran
965 = 5 × 193, also ISBN Group Identifier for books published in Israel
966 = 2 × 3 × 7 × 23, sum of eight consecutive primes (103 + 107 + 109 + 113 + 127 + 131 + 137 + 139), Harshad number, also one of two ISBN Group Identifiers for books published in Ukraine
967 prime number, also one of two ISBN Group Identifiers for books published in Malaysia
968 = 23 × 112, nontotient, also one of two ISBN Group Identifiers for books published in Mexico
969 = 3 × 17 × 19, sphenic number, nonagonal number, tetrahedral number, also ISBN Group Identifier for books published in Pakistan
970 = 2 × 5 × 97, sphenic number, also one of two ISBN Group Identifiers for books published in Mexico
971 prime number, also ISBN Group Identifier for books published in the Philippines
972 = 22 × 35, Harshad number, also one of two ISBN Group Identifiers for books published in Portugal
973 = 7 × 139, also ISBN Group Identifier for books published in Romania
974 = 2 × 487, nontotient, also ISBN Group Identifier for books published in Thailand
975 = 3 × 52 × 13, also ISBN Group Identifier for books published in Turkey
976 = 24 × 61, decagonal number, also ISBN Group Identifier for books published in Antigua, Bahamas, Barbados, Belize, Cayman Islands, Dominica, Grenada, Guyana, Jamaica, Montserrat, St. Kitts-Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, and the British Virgin Islands
977 prime number, sum of nine consecutive primes (89 + 97 + 101 + 103 + 107 + 109 + 113 + 127 + 131), also ISBN Group Identifier for books published in Egypt
978 = 2 × 3 × 163, sphenic number, nontotient, also ISBN Group Identifier for books published in Nigeria
979 = 11 × 89, also ISBN Group Identifier for books published in Indonesia
980 = 22 × 5 × 72, also ISBN Group Identifier for books published in Venezuela
981 = 32 × 109, also one of two ISBN Group Identifiers for books published in Singapore
982 = 2 × 491, also ISBN Group Identifier for books published in the Cook Islands, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Caledonia, Niue, Palau, Solomon Islands, Tokelau, Tonga, Tuvalu, Vanuatu, Western Samoa
983 prime number, safe prime, Wedderburn-Etherington number, also one of two ISBN Group Identifiers for books published in Malaysia
984 = 23 × 3 × 41, also ISBN Group Identifier for books published in Bangladesh
985 = 5 × 197, sum of three consecutive primes (317 + 331 + 337), Smith number, also one of two ISBN Group Identifiers for books published in Belarus
986 = 2 × 17 × 29, sphenic number, nontotient, also one of two ISBN Group Identifiers for books published in Taiwan and China
987 = 3 × 7 × 47, also one of two ISBN Group Identifiers for books published in Argentina
988 = 22 × 13 × 19, sum of four consecutive primes (239 + 241 + 251 + 257), nontotient, also one of two ISBN Group Identifiers for books published in Hong Kong
989 = 23 × 43, also one of two ISBN Group Identifiers for books published in Portugal
990 = 2 × 32 × 5 × 11, sum of six consecutive primes (151 + 157 + 163 + 167 + 173 + 179), triangular number, Harshad number
991 prime number, sum of five consecutive primes (191 + 193 + 197 + 199 + 211), sum of seven consecutive primes (127 + 131 + 137 + 139 + 149 + 151 + 157)
992 = 25 × 31, pronic number, nontotient; number of eleven-dimensional exotic spheres [1] (http://math.ucr.edu/home/baez/week164.html).
993 = 3 × 331
994 = 2 × 7 × 71, sphenic number, nontotient
995 = 5 × 199
996 = 22 × 3 × 83
997 prime number
998 = 2 × 499, nontotient
999 = 33 × 37, Kaprekar number, Harshad number
- In some parts of the world, such as the UK and Commonwealth countries, 999 (pronounced as 9-9-9) is the emergency telephone number; it is as of 2004 being quickly supplemented, by the international emergency number 112 and the North American 911 (number).
- 999 was also the name of a significant London punk band active during the 1970s.
See also: 1000 (number)