169 is the natural number following one hundred sixty-eight and preceding one hundred seventy.

169
Cardinal	one hundred [and] sixty-nine
Ordinal	169th
Factorization	<math>169 = 13^2<math>
Roman numeral	CLXIX
Binary	10101001
Hexadecimal	A9

One hundred sixty-nine is one of the few squares to also be a centered hexagonal number. But like any other odd square, it is also a centered octagonal number.

It is a Pell number.

It is the sum of seven consecutive primes, 13 + 17 + 19 + 23 + 29 + 31 + 37.

It is the number of starting hands in holdem (see http://www.math.sfu.ca/~alspach/art3.pdf for an explanation).

See also one hundred sixty

For the year AD, see 169 AD.

sl:169 (število)