# 9000 (number)

9000 (nine thousand) is the natural number following 8999 and preceding 9001.

 ← 8999 9000 9001 →
Cardinalnine thousand
Ordinal9000th
(nine thousandth)
Factorization23 × 32 × 53
Greek numeral,Θ´
Roman numeralMX, or IX
Unicode symbol(s)MX, mx, IX, ix
Binary100011001010002
Ternary1101001003
Octal214508
Duodecimal526012

## Selected numbers in the range 9001–9999

### 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

• 9601Proth prime
• 9604982
• 9619super-prime
• 9629 – Sophie Germain prime
• 9647 – centered heptagonal number
• 9661super-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
• 9739super-prime
• 9743 – safe prime
• 9791 – Sophie Germain prime

## References

1. ^ "Sloane's A005898 : Centered cube numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
2. ^ "Sloane's A002559 : Markoff (or Markov) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
3. ^ a b "Sloane's A040017 : Unique period primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
4. ^ "Sloane's A002411 : Pentagonal pyramidal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
5. ^ a b "Sloane's A000292 : Tetrahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
6. ^ "Sloane's A005900 : Octahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
7. ^ "Sloane's A002407 : Cuban primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
8. ^ "Sloane's A006037 : Weird numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
9. ^ "Sloane's A005479 : Prime Lucas numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
10. ^ "Sloane's A000330 : Square pyramidal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-06-14.
11. ^ An Executable Prime Number?, archived from the original on 2010-02-10