9000 (number)

9000[8000 (number)|] is the natural number following
8999 and preceding 9001.

Selected numbers in the range 9001–9999

9001 to 9099

9001 – sexy prime with 90079007 – sexy prime with 90019009 – centered cube number9025 = 95², centered octagonal number9029 – Sophie Germain prime9041 – super-prime9045 – triangular number9059 – Sophie Germain prime9072 – decagonal number9077 – Markov number9091 – unique prime

9100 to 9199

9103 – super-prime9126 – pentagonal pyramidal number9139 – tetrahedral number9175 – smallest generalized Sierpiński number in base 10: is always divisible by one of the prime numbers.9180 – triangular number

9200 to 9299

9216 = 96²9221 – Sophie Germain prime9224 – octahedral number9232 — Peak of 27 in Collatz Conjecture.9241 – cuban prime of the form x = y + 19261 = 21³, largest 4 digit perfect cube9272 – weird number9283 – centered heptagonal number9293 – Sophie Germain prime, super-prime

9300 to 9399

9316 – triangular number9319 – super-prime9334 – nonagonal number9349 – Lucas prime, Fibonacci number9361 - star number9371 – Sophie Germain prime9376 – 1-automorphic number9397 – balanced prime

9400 to 9499

9403 – super-prime9409 = 97², centered octagonal number9419 – Sophie Germain prime9439 – completes the twelfth prime quadruplet set9453 – triangular number9455 – square pyramidal number9457 – decagonal number9461 – super-prime, twin prime9467 – safe prime9473 – Sophie Germain prime, balanced prime, Proth prime9474 – Narcissistic number in base 109479 – Sophie Germain prime9496 – Telephone/involution number

9500 to 9599

9511 - prime number 9521 - prime number 9533 - prime number9539 – Sophie Germain prime, super-prime9551 – first prime followed by as many as 35 consecutive composite numbers9587 – safe prime, follows 35 consecutive composite numbers9591 – triangular number9592 - the number of primes under 100,000

9600 to 9699

9601 – Proth prime9604 = 98²9619 – super-prime9629 – Sophie Germain prime9647 – centered heptagonal number9661 – super-prime, sum of nine consecutive primes 9689 – Sophie Germain prime9699 – nonagonal number

9700 to 9799

9721 – prime of the form 2p-19730 – triangular number9739 – super-prime9743 – safe prime9791 – Sophie Germain prime

9800 to 9899

9800 – member of a Ruth-Aaron pair with 98019801 = 99², the largest 4 digit perfect square, centered octagonal number, square pentagonal number, member of a Ruth-Aaron pair with 98009833 – super-prime9839 – safe prime9841 - star number9850 – decagonal number9857 – Proth prime9859 – super-prime9870 – triangular number9871 – balanced prime9880 – tetrahedral number9887 – safe prime

9900 to 9999

9901 – unique prime, sum of seven consecutive primes 9905 – number of compositions of 16 whose run-lengths are either weakly increasing or weakly decreasing9923 – super-prime, probably smallest certainly executable prime number on x86 MS-DOS9949 – sum of nine consecutive primes 9973 – super-prime9988 – number of prime knots with 13 crossings9999 – Kaprekar number, repdigit

Prime numbers

There are 112 prime numbers between 9000 and 10000: