79136613 has 6 divisors (see below), whose sum is σ = 114308454. Its totient is φ = 52757736.

The previous prime is 79136587. The next prime is 79136623. The reversal of 79136613 is 31663197.

79136613 is a `hidden beast` number, since 7 + 9 + 1 + 36 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77739489 + 1397124 = 8817^2 + 1182^2 .

It is not a de Polignac number, because 79136613 - 2⁶ = 79136549 is a prime.

It is a super-2 number, since 2×79136613² = 12525207034223538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79136623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4396470 + ... + 4396487.

It is an arithmetic number, because the mean of its divisors is an integer number (19051409).

Almost surely, 2^79136613 is an apocalyptic number.

It is an amenable number.

79136613 is a deficient number, since it is larger than the sum of its proper divisors (35171841).

79136613 is a wasteful number, since it uses less digits than its factorization.

79136613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792963 (or 8792960 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 79136613 is about 8895.8761794440. The cubic root of 79136613 is about 429.3312355361.

The spelling of 79136613 in words is "seventy-nine million, one hundred thirty-six thousand, six hundred thirteen".