Check the properties of a positive integer to enter the number in the search box. If you input two numbers separated by a space, the properties of the pair like GCD are shown. If you separate two numbers by a comma, the sequences containing those numbers are listed.
9 = 3 × 3
| Factor | Count |
|---|---|
| 3 | 2 |
3
2.08008382305190409056194766890258...
0.1111111111111111
1001
4
11
9
| Prime number | No |
| Hexagonal number | No |
| Perfect number | No |
| Deficient number | Yes |
| Abundant number | No |
| Mersenne number | No |
| Harshad number | Yes |
| Harmonic divisor number | No |
QR9 (sequence)
0
Properties of the number 9: 9 has 3 divisors. The divisors of 9 are 1, 3, 9 and the sum of them is 13. The factorization of 9 is 3 × 3. The square and cube of 9 are 81 and 729 respectively. The square root and cube root of 9 are 3 and 2.08008382305190409056194766890258.... The binary, octal, hexadecimal of 9 are 1001, 11, 9. 9 is not a prime number, not hexagonal number, not perfect number, deficient number, not Mersenne number, not Mersenne number, Harshad number, not harmonic divisor number.
0.41211848524175659358448342572956...
-0.91113026188467693966543947681203...
-0.45231565944180984750744300981751...
0.15643446504023086895962535436411...
0.98768834059513777035022030759137...
0.15838444032453627419165798073664...
2.19722457733621956421643517387565...
0.95424250943932487079024440390640...
3.16992500144231215131185308564454...