56921679 has 12 divisors (see below), whose sum is σ = 82285632. Its totient is φ = 37917600.

The previous prime is 56921621. The next prime is 56921687. The reversal of 56921679 is 97612965.

It is a happy number.

56921679 is a `hidden beast` number, since 569 + 2 + 16 + 79 = 666.

It is not a de Polignac number, because 56921679 - 2⁹ = 56921167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56921699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20674 + ... + 23264.

It is an arithmetic number, because the mean of its divisors is an integer number (6857136).

Almost surely, 2^56921679 is an apocalyptic number.

56921679 is a deficient number, since it is larger than the sum of its proper divisors (25363953).

56921679 is a wasteful number, since it uses less digits than its factorization.

56921679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038 (or 5035 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 56921679 is about 7544.6457173283. The cubic root of 56921679 is about 384.6737642285.

It can be divided in two parts, 56921 and 679, that added together give a square (57600 = 240²).

The spelling of 56921679 in words is "fifty-six million, nine hundred twenty-one thousand, six hundred seventy-nine".