13391668 has 12 divisors (see below), whose sum is σ = 23467360. Its totient is φ = 6686712.

The previous prime is 13391641. The next prime is 13391683. The reversal of 13391668 is 86619331.

13391668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855 + ... + 5497.

Almost surely, 2^13391668 is an apocalyptic number.

It is an amenable number.

13391668 is a deficient number, since it is larger than the sum of its proper divisors (10075692).

13391668 is a wasteful number, since it uses less digits than its factorization.

13391668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566 (or 4564 counting only the distinct ones).

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

The square root of 13391668 is about 3659.4628021063. The cubic root of 13391668 is about 237.4715341691.

The spelling of 13391668 in words is "thirteen million, three hundred ninety-one thousand, six hundred sixty-eight".