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 9001–9999

9001 to 9099
 9009 – centered cube number
 9025 – 952, centered octagonal number
 9029 – Sophie Germain prime
 9041 – super-prime
 9045 – triangular number
 9059 – Sophie Germain prime
 9072 – decagonal number
 9077 – Markov number
 9091 – unique prime

9100 to 9199
 9103 – super-prime
 9126 – pentagonal pyramidal number
 9139 – tetrahedral number
 9180 – triangular number

9200 to 9299
 9216 – 962
 9221 – Sophie Germain prime
 9224 – octahedral number
 9241 – cuban prime of the form x = y + 1
 9261 – 213, largest 4 digit perfect cube
 9272 – weird number
 9283 – centered heptagonal number
 9293 – Sophie Germain prime, super-prime

9300 to 9399
 9316 – triangular number
 9319 – super-prime
 9334 – nonagonal number
 9349 – Lucas prime, Fibonacci number
 9371 – Sophie Germain prime
 9376 – 1-automorphic number
 9397 – balanced prime

9400 to 9499
 9403 – super-prime
 9409 – 972, centered octagonal number
 9419 – Sophie Germain prime
 9439 – completes the twelfth prime quadruplet set
 9453 – triangular number
 9455 – square pyramidal number
 9457 – decagonal number
 9461 – super-prime, twin prime
 9467 – safe prime
 9473 – Sophie Germain prime, balanced prime, Proth prime
 9479 – Sophie Germain prime

9500 to 9599
 9539 – Sophie Germain prime, super-prime
 9551 – first prime followed by as many as 35 consecutive composite numbers
 9587 – safe prime, follows 35 consecutive composite numbers
 9591 – triangular number

9600 to 9699
 9601 – Proth prime
 9604 – 982
 9619 – super-prime
 9629 – Sophie Germain prime
 9647 – centered heptagonal number
 9660 – ISO 9660 standard for CD-ROM file system
 9661 – super-prime, sum of nine consecutive primes (1049 + 1051 + 1061 + 1063 + 1069 + 1087 + 1091 + 1093 + 1097)
 9689 – Sophie Germain prime
 9699 – nonagonal number

9700 to 9799
 9721 – prime of the form 2p-1
 9730 – triangular number
 9739 – super-prime
 9743 – safe prime
 9791 – Sophie Germain prime

9800 to 9899
 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
 9833 – super-prime
 9839 – safe prime
 9850 – decagonal number
 9855 – magic constant of n × n normal magic square and n-Queens Problem for n = 27.
 9857 – Proth prime
 9859 – super-prime
 9870 – triangular number
 9871 – balanced prime
 9880 – tetrahedral number
 9887 – safe prime
 9899 – ISO 9899 standard for C programming language

9900 to 9999
 9901 – unique prime, sum of seven consecutive primes (1381 + 1399 + 1409 + 1423 + 1427 + 1429 + 1433)
 9923 – super-prime, probably smallest certainly executable prime number on x86 MS-DOS 
 9949 – sum of nine consecutive primes (1087 + 1091 + 1093 + 1097 + 1103 + 1109 + 1117 + 1123 + 1129)
 9973 – super-prime, largest four-digit prime
 9999 – Kaprekar number, Repdigit

References 

Category:Integers