13931668 has 12 divisors (see below), whose sum is σ = 24780532. Its totient is φ = 6851520.

The previous prime is 13931663. The next prime is 13931669. The reversal of 13931668 is 86613931.

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 13557124 = 612^2 + 3682^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13931663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28305 + ... + 28792.

Almost surely, 2^13931668 is an apocalyptic number.

It is an amenable number.

13931668 is a deficient number, since it is larger than the sum of its proper divisors (10848864).

13931668 is a wasteful number, since it uses less digits than its factorization.

13931668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57162 (or 57160 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 13931668 is about 3732.5149698293. The cubic root of 13931668 is about 240.6214680541.

The spelling of 13931668 in words is "thirteen million, nine hundred thirty-one thousand, six hundred sixty-eight".