169090 has 16 divisors (see below), whose sum is σ = 313272. Its totient is φ = 65664.

The previous prime is 169079. The next prime is 169093. The reversal of 169090 is 90961.

It can be written as a sum of positive squares in 4 ways, for example, as 168921 + 169 = 411^2 + 13^2 .

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (169093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 598.

2¹⁶⁹⁰⁹⁰ is an apocalyptic number.

169090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169090 is a deficient number, since it is larger than the sum of its proper divisors (144182).

169090 is a wasteful number, since it uses less digits than its factorization.

169090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 169090 is about 411.2055447097. The cubic root of 169090 is about 55.2975607883.

It can be divided in two parts, 1690 and 90, that multiplied together give a square (152100 = 390²).

The spelling of 169090 in words is "one hundred sixty-nine thousand, ninety".