169490690 has 8 divisors (see below), whose sum is σ = 305083260. Its totient is φ = 67796272.

The previous prime is 169490687. The next prime is 169490701. The reversal of 169490690 is 96094961.

It can be written as a sum of positive squares in 2 ways, for example, as 167935681 + 1555009 = 12959^2 + 1247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×169490690² = 57454187993352200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8474525 + ... + 8474544.

Almost surely, 2^169490690 is an apocalyptic number.

169490690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169490690 is a deficient number, since it is larger than the sum of its proper divisors (135592570).

169490690 is a wasteful number, since it uses less digits than its factorization.

169490690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949076.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 169490690 is about 13018.8590129857. The cubic root of 169490690 is about 553.4120559437.

The spelling of 169490690 in words is "one hundred sixty-nine million, four hundred ninety thousand, six hundred ninety".