109 (number)
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109 is the natural number following 108 and preceding 110.
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| Cardinal | one hundred [and] nine | ||
| Ordinal | 109th | ||
| Factorization | <math>prime<math> | ||
| Roman numeral | CIX | ||
| Binary | 1101101 | ||
| Hexadecimal | 6D | ||
One hundred nine (British English: One hundred and nine)is the 29th prime number. The previous prime is 107, making them both twin primes. 109 is a centered triangular number. 109 is the smallest number which is palindromic in bases 5 and 9.
One hundred nine is also:
- The atomic number of meitnerium.
- The registry number of the famous patrol boat PT-109, commanded by John F. Kennedy.
- The year AD 109 or 109 BC.