MathQuarryCalculators

Numbers / 169

The Number 169

169 is composite: factorization 13^2. That gives 169 exactly 3 divisors: 1, 13, 169. 169's proper divisors total just 14, 155 short of 169, the deficient case most of 169's neighbors share too. 169 is also a perfect square, since 13² = 169. 169 has a digit sum of 16; for 169, the digital root works out to 7. 169 shares no factor with 2-12; 169's own divisors start beyond that range. 169 is 10101001 in binary and A9 in hex; as a Roman numeral it's CLXIX.

Factors
1, 13, 169
Number of factors
3
Prime?
No
Prime factorization
13^2
Even or odd
Odd
Square
28561
Cube
4826809
Binary
10101001
Hexadecimal
A9
Roman numeral
CLXIX
Perfect square?
Yes
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Factors of 169 in detail →Is 169 prime? →