13392639 has 12 divisors (see below), whose sum is σ = 20833176. Its totient is φ = 8241552.

The previous prime is 13392629. The next prime is 13392641. The reversal of 13392639 is 93629331.

It is a happy number.

13392639 is a `hidden beast` number, since 13 + 3 + 9 + 2 + 639 = 666.

It is not a de Polignac number, because 13392639 - 2⁸ = 13392383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13392619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57117 + ... + 57350.

It is an arithmetic number, because the mean of its divisors is an integer number (1736098).

Almost surely, 2^13392639 is an apocalyptic number.

13392639 is a deficient number, since it is larger than the sum of its proper divisors (7440537).

13392639 is a wasteful number, since it uses less digits than its factorization.

13392639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114486 (or 114483 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 13392639 is about 3659.5954694474. The cubic root of 13392639 is about 237.4772735410.

The spelling of 13392639 in words is "thirteen million, three hundred ninety-two thousand, six hundred thirty-nine".