56019979 has 4 divisors (see below), whose sum is σ = 56067376. Its totient is φ = 55972584.

The previous prime is 56019959. The next prime is 56019991. The reversal of 56019979 is 97991065.

56019979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56019979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56019959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21879 + ... + 24304.

It is an arithmetic number, because the mean of its divisors is an integer number (14016844).

Almost surely, 2^56019979 is an apocalyptic number.

56019979 is a deficient number, since it is larger than the sum of its proper divisors (47397).

56019979 is a wasteful number, since it uses less digits than its factorization.

56019979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47396.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 56019979 is about 7484.6495575945. The cubic root of 56019979 is about 382.6317293021.

The spelling of 56019979 in words is "fifty-six million, nineteen thousand, nine hundred seventy-nine".