56656739 has 4 divisors (see below), whose sum is σ = 57585600. Its totient is φ = 55727880.

The previous prime is 56656729. The next prime is 56656753. The reversal of 56656739 is 93765665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56656739 - 2¹² = 56652643 is a prime.

It is a super-2 number, since 2×56656739² = 6419972148228242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56656693 and 56656702.

It is not an unprimeable number, because it can be changed into a prime (56656709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464339 + ... + 464460.

It is an arithmetic number, because the mean of its divisors is an integer number (14396400).

Almost surely, 2^56656739 is an apocalyptic number.

56656739 is a deficient number, since it is larger than the sum of its proper divisors (928861).

56656739 is an equidigital number, since it uses as much as digits as its factorization.

56656739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928860.

The product of its digits is 1020600, while the sum is 47.

The square root of 56656739 is about 7527.0670915038. The cubic root of 56656739 is about 384.0760189306.

The spelling of 56656739 in words is "fifty-six million, six hundred fifty-six thousand, seven hundred thirty-nine".