56139879 has 8 divisors (see below), whose sum is σ = 76265712. Its totient is φ = 36720320.

The previous prime is 56139871. The next prime is 56139887. The reversal of 56139879 is 97893165.

It is an interprime number because it is at equal distance from previous prime (56139871) and next prime (56139887).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56139879 - 2³ = 56139871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56139871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176382 + ... + 176699.

It is an arithmetic number, because the mean of its divisors is an integer number (9533214).

Almost surely, 2^56139879 is an apocalyptic number.

56139879 is a deficient number, since it is larger than the sum of its proper divisors (20125833).

56139879 is a wasteful number, since it uses less digits than its factorization.

56139879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353137.

The product of its digits is 408240, while the sum is 48.

The square root of 56139879 is about 7492.6550034017. The cubic root of 56139879 is about 382.9045180067.

The spelling of 56139879 in words is "fifty-six million, one hundred thirty-nine thousand, eight hundred seventy-nine".