# 9

9

3

13

9 = 3 × 3

Factor Count
3 2

81

729

3

## Cube root of 9

2.08008382305190409056194766890258...

45

## Reciprocal of 9

0.1111111111111111

1001

4

## Octal of 9

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)

16

6

6

0

## Properties of 9

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.

## sin 9

0.41211848524175659358448342572956...

## cos 9

-0.91113026188467693966543947681203...

## tan 9

-0.45231565944180984750744300981751...

## sin 9°

0.15643446504023086895962535436411...

## cos 9°

0.98768834059513777035022030759137...

## tan 9°

0.15838444032453627419165798073664...

## log 9

2.19722457733621956421643517387565...

## log10 9

0.95424250943932487079024440390640...

## log2 9

3.16992500144231215131185308564454...