56979717 has 16 divisors (see below), whose sum is σ = 80777088. Its totient is φ = 35647040.

The previous prime is 56979691. The next prime is 56979719. The reversal of 56979717 is 71797965.

It is a cyclic number.

It is not a de Polignac number, because 56979717 - 2⁶ = 56979653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56979717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56979719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4134 + ... + 11447.

It is an arithmetic number, because the mean of its divisors is an integer number (5048568).

Almost surely, 2^56979717 is an apocalyptic number.

It is an amenable number.

56979717 is a deficient number, since it is larger than the sum of its proper divisors (23797371).

56979717 is a wasteful number, since it uses less digits than its factorization.

56979717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15660.

The product of its digits is 833490, while the sum is 51.

The square root of 56979717 is about 7548.4910412612. The cubic root of 56979717 is about 384.8044590872.

The spelling of 56979717 in words is "fifty-six million, nine hundred seventy-nine thousand, seven hundred seventeen".