56713921 has 8 divisors (see below), whose sum is σ = 65509344. Its totient is φ = 48525120.

The previous prime is 56713903. The next prime is 56713931. The reversal of 56713921 is 12931765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56713921 - 2⁵ = 56713889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56713901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151455 + ... + 151828.

It is an arithmetic number, because the mean of its divisors is an integer number (8188668).

Almost surely, 2^56713921 is an apocalyptic number.

It is an amenable number.

56713921 is a deficient number, since it is larger than the sum of its proper divisors (8795423).

56713921 is a wasteful number, since it uses less digits than its factorization.

56713921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303311.

The product of its digits is 11340, while the sum is 34.

The square root of 56713921 is about 7530.8645586015. The cubic root of 56713921 is about 384.2051877393.

The spelling of 56713921 in words is "fifty-six million, seven hundred thirteen thousand, nine hundred twenty-one".