9000 (number)

← 8999 9000 9001 →
List of numbers — Integers ← 0 1k 2k 3k 4k 5k 6k 7k 8k 9k →
Cardinal	nine thousand
Ordinal	9000th (nine thousandth)
Factorization	23× 32× 53
Greek numeral	,Θ´
Roman numeral	MX, or IX
Unicode symbol(s)	MX, mx, IX, ix
Binary	100011001010002
Ternary	1101001003
Quaternary	20302204
Quinary	2420005
Senary	1054006
Octal	214508
Duodecimal	526012
Hexadecimal	232816
Vigesimal	12A020
Base 36	6Y036
Armenian	Ք

9000 (nine thousand) is the natural number after 8999 and before 9001.

Selected numbers: 9001–9999

9001 to 9099

• 9001 – sexy prime with 9007
• 9007 – sexy prime with 9001
• 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
• 9175 – smallest (provable) generalized Sierpiński number in base 10: 9175*10ⁿ+1 is always divisible by one of the prime numbers {7, 11, 13, 73}.
• 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
• 9474 – Narcissistic number in base 10
• 9479 – Sophie Germain prime
• 9496 – Telephone/involution number

9500 to 9599

• 9511 - prime number
• 9521 - prime number
• 9533 - prime number
• 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
• 9592 - amount of prime numbers under 100,000

9600 to 9699

• 9601 – Proth prime
• 9604 = 98²
• 9619 – super-prime
• 9629 – Sophie Germain prime
• 9647 – centered heptagonal number
• 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, the largest 4 digit perfect square, centered octagonal number, square pentagonal 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

9900 to 9999

• 9901 – unique prime, sum of seven consecutive primes (1381 + 1399 + 1409 + 1423 + 1427 + 1429 + 1433)
• 9905 – number of compositions of 16 whose run-lengths are either weakly increasing or weakly decreasing
• 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
• 9999 – Kaprekar number, repdigit

Prime numbers

There are 112 prime numbers between 9000 and 10000:

9001, 9007, 9011, 9013, 9029, 9041, 9043, 9049, 9059, 9067, 9091, 9103, 9109, 9127, 9133, 9137, 9151, 9157, 9161, 9173, 9181, 9187, 9199, 9203, 9209, 9221, 9227, 9239, 9241, 9257, 9277, 9281, 9283, 9293, 9311, 9319, 9323, 9337, 9341, 9343, 9349, 9371, 9377, 9391, 9397, 9403, 9413, 9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 9467, 9473, 9479, 9491, 9497, 9511, 9521, 9533, 9539, 9547, 9551, 9587, 9601, 9613, 9619, 9623, 9629, 9631, 9643, 9649, 9661, 9677, 9679, 9689, 9697, 9719, 9721, 9733, 9739, 9743, 9749, 9767, 9769, 9781, 9787, 9791, 9803, 9811, 9817, 9829, 9833, 9839, 9851, 9857, 9859, 9871, 9883, 9887, 9901, 9907, 9923, 9929, 9931, 9941, 9949, 9967, 9973