168012904 has 16 divisors (see below), whose sum is σ = 333555300. Its totient is φ = 79064832.

The previous prime is 168012899. The next prime is 168012913. The reversal of 168012904 is 409210861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152028900 + 15984004 = 12330^2 + 3998^2 .

It is an unprimeable number.

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, 617559 + ... + 617830.

Almost surely, 2^168012904 is an apocalyptic number.

It is an amenable number.

168012904 is a deficient number, since it is larger than the sum of its proper divisors (165542396).

168012904 is a wasteful number, since it uses less digits than its factorization.

168012904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235412 (or 1235408 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 168012904 is about 12961.9791698645. The cubic root of 168012904 is about 551.7989623580.

The spelling of 168012904 in words is "one hundred sixty-eight million, twelve thousand, nine hundred four".