56679891 has 32 divisors (see below), whose sum is σ = 81312000. Its totient is φ = 35054208.

The previous prime is 56679877. The next prime is 56679899. The reversal of 56679891 is 19897665.

It is not a de Polignac number, because 56679891 - 2⁵ = 56679859 is a prime.

It is a super-2 number, since 2×56679891² = 6425220087543762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56679899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407700 + ... + 407838.

It is an arithmetic number, because the mean of its divisors is an integer number (2541000).

Almost surely, 2^56679891 is an apocalyptic number.

56679891 is a deficient number, since it is larger than the sum of its proper divisors (24632109).

56679891 is a wasteful number, since it uses less digits than its factorization.

56679891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 816480, while the sum is 51.

The square root of 56679891 is about 7528.6048508339. The cubic root of 56679891 is about 384.1283276068.

The spelling of 56679891 in words is "fifty-six million, six hundred seventy-nine thousand, eight hundred ninety-one".