56879999 has 16 divisors (see below), whose sum is σ = 63757824. Its totient is φ = 50306400.

The previous prime is 56879959. The next prime is 56880029. The reversal of 56879999 is 99997865.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56879999 is a prime.

56879999 is a modest number, since divided by 9999 gives 5687 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56879959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68702 + ... + 69524.

It is an arithmetic number, because the mean of its divisors is an integer number (3984864).

Almost surely, 2^56879999 is an apocalyptic number.

56879999 is a deficient number, since it is larger than the sum of its proper divisors (6877825).

56879999 is a wasteful number, since it uses less digits than its factorization.

56879999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998.

The product of its digits is 11022480, while the sum is 62.

The square root of 56879999 is about 7541.8829876895. The cubic root of 56879999 is about 384.5798508741.

The spelling of 56879999 in words is "fifty-six million, eight hundred seventy-nine thousand, nine hundred ninety-nine".