9000 (number)

9000 (nine thousand) 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. This includes ISO 9001–9004.

Selected numbers in the range 9000–9999

• 9009 – centered cube number^[1]
• 9025 – 95², centered octagonal number
• 9029 – Sophie Germain prime
• 9045 – triangular number
• 9059 – Sophie Germain prime
• 9072 – decagonal number
• 9077 – Markov number^[2]
• 9091 – unique prime^[3]
• 9126 – pentagonal pyramidal number^[4]
• 9139 – tetrahedral number^[5]
• 9180 – triangular number
• 9216 – 96²
• 9221 – Sophie Germain prime
• 9224 – octahedral number^[6]
• 9241 – cuban prime of the form x = y + 1^[7]
• 9261 - 21³, largest 4 digit perfect cube
• 9272 – weird number^[8]
• 9283 – centered heptagonal number
• 9293 – Sophie Germain prime
• 9316 – triangular number
• 9334 – nonagonal number
• 9349 – Lucas prime^[9]
• 9371 – Sophie Germain prime
• 9397 – balanced prime
• 9409 – 97², centered octagonal number
• 9419 – Sophie Germain prime
• 9453 – triangular number
• 9455 – square pyramidal number^[10]
• 9457 – decagonal number
• 9467 – safe prime
• 9473 – Sophie Germain prime, balanced prime
• 9479 – Sophie Germain prime
• 9539 – Sophie Germain prime
• 9587 – safe prime
• 9591 – triangular number
• 9604 – 98²
• 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
• 9800 – member of a Ruth-Aaron pair (first definition) with 9801
• 9801 – 99², centered octagonal number, member of a Ruth-Aaron pair (first definition) with 9800
• 9839 – safe prime
• 9850 – decagonal number
• 9855 – magic constant of n × n normal magic square and n-Queens Problem for n = 27.
• 9870 – triangular number
• 9871 – balanced prime
• 9880 – tetrahedral number^[5]
• 9887 – safe prime
• 9899 – ISO 9899 standard for C programming language
• 9901 – unique prime^[3]
• 9923 – probably smallest certainly executable prime number on x86 MS-DOS ^[11]
• 9999 – Kaprekar number, Repdigit

References