9000 is the natural number following 8999 and preceding 9001.
In other fields
- ISO 9000 is the ISO's standard for Quality Management System in production environments
Selected numbers in the range 9001 - 9999
- 9001 - ISO 9001 is part of ISO 9000
- 9002 - ISO 9002 is part of ISO 9000
- 9003 - ISO 9003 is part of ISO 9000
- 9004 - ISO 9004 is part of ISO 9000
- 9009 - centered cube number
- 9025 = 95^2, centered octagonal number
- 9029 - Sophie Germain prime
- 9045 - triangular number
- 9059 - Sophie Germain prime
- 9072 - decagonal number
- 9091 - unique prime
- 9126 - pentagonal pyramidal number
- 9139 - tetrahedral number
- 9180 - triangular number
- 9216 = 96^2
- 9221 - Sophie Germain prime
- 9224 - octahedral number
- 9241 - cuban prime of the form x = y + 1
- 9272 - weird number
- 9283 - centered heptagonal number
- 9293 - Sophie Germain prime
- 9316 - triangular number
- 9334 - nonagonal number
- 9371 - Sophie Germain prime
- 9409 = 97^2, centered octagonal number
- 9419 - Sophie Germain prime
- 9453 - triangular number
- 9455 - square pyramidal number
- 9457 - decagonal number
- 9467 - safe prime
- 9473 - Sophie Germain prime
- 9479 - Sophie Germain prime
- 9539 - Sophie Germain prime
- 9587 - safe prime
- 9591 - triangular number
- 9604 = 98^2
- 9629 - Sophie Germain prime
- 9647 - centered heptagonal number
- 9660 - ISO 9660 standard for CD-ROM file system
- 9689 - Sophie Germain prime
- 9699 - nonagonal number
- 9730 - triangular number
- 9743 - safe prime
- 9791 - Sophie Germain prime
- 9801 = 99^2, centered octagonal number
- 9839 - safe prime
- 9850 - decagonal number
- 9870 - triangular number
- 9880 - tetrahedral number
- 9887 - safe prime
- 9899 - ISO 9899 standard for C programming language
- 9901 - unique prime
- 9985 - chiliagonal number
- 9999 - Kaprekar number
ko:9000
