169090402 has 8 divisors (see below), whose sum is σ = 273146076. Its totient is φ = 78041712.

The previous prime is 169090391. The next prime is 169090403. The reversal of 169090402 is 204090961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167210761 + 1879641 = 12931^2 + 1371^2 .

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

It is not an unprimeable number, because it can be changed into a prime (169090403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251713 + ... + 3251764.

Almost surely, 2^169090402 is an apocalyptic number.

169090402 is a deficient number, since it is larger than the sum of its proper divisors (104055674).

169090402 is a wasteful number, since it uses less digits than its factorization.

169090402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503492.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 169090402 is about 13003.4765351424. The cubic root of 169090402 is about 552.9760461030.

The spelling of 169090402 in words is "one hundred sixty-nine million, ninety thousand, four hundred two".