56139479 has 8 divisors (see below), whose sum is σ = 62546688. Its totient is φ = 49949560.

The previous prime is 56139463. The next prime is 56139497. The reversal of 56139479 is 97493165.

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 56139479 - 2⁴ = 56139463 is a prime.

It is a super-2 number, since 2×56139479² = 6303282204782882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56139079) 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, 53777 + ... + 54810.

It is an arithmetic number, because the mean of its divisors is an integer number (7818336).

Almost surely, 2^56139479 is an apocalyptic number.

56139479 is a deficient number, since it is larger than the sum of its proper divisors (6407209).

56139479 is a wasteful number, since it uses less digits than its factorization.

56139479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108645.

The product of its digits is 204120, while the sum is 44.

The square root of 56139479 is about 7492.6283105463. The cubic root of 56139479 is about 382.9036085987.

The spelling of 56139479 in words is "fifty-six million, one hundred thirty-nine thousand, four hundred seventy-nine".