56915779 has 4 divisors (see below), whose sum is σ = 60263784. Its totient is φ = 53567776.

The previous prime is 56915753. The next prime is 56915809. The reversal of 56915779 is 97751965.

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 56915779 - 2⁹ = 56915267 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56910779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673977 + ... + 1674010.

It is an arithmetic number, because the mean of its divisors is an integer number (15065946).

Almost surely, 2^56915779 is an apocalyptic number.

56915779 is a deficient number, since it is larger than the sum of its proper divisors (3348005).

56915779 is a wasteful number, since it uses less digits than its factorization.

56915779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348004.

The product of its digits is 595350, while the sum is 49.

The square root of 56915779 is about 7544.2547014268. The cubic root of 56915779 is about 384.6604731376.

The spelling of 56915779 in words is "fifty-six million, nine hundred fifteen thousand, seven hundred seventy-nine".