13613139 has 12 divisors (see below), whose sum is σ = 20698600. Its totient is φ = 8597664.

The previous prime is 13613137. The next prime is 13613153. The reversal of 13613139 is 93131631.

13613139 is a `hidden beast` number, since 13 + 613 + 1 + 39 = 666.

It is not a de Polignac number, because 13613139 - 2¹ = 13613137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13613137) 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, 39634 + ... + 39975.

Almost surely, 2^13613139 is an apocalyptic number.

13613139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13613139 is a deficient number, since it is larger than the sum of its proper divisors (7085461).

13613139 is a wasteful number, since it uses less digits than its factorization.

13613139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79634 (or 79631 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 13613139 is about 3689.5987586728. The cubic root of 13613139 is about 238.7734821526.

The spelling of 13613139 in words is "thirteen million, six hundred thirteen thousand, one hundred thirty-nine".