56936721 has 8 divisors (see below), whose sum is σ = 75950784. Its totient is φ = 37940240.

The previous prime is 56936717. The next prime is 56936777. The reversal of 56936721 is 12763965.

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 56936721 - 2² = 56936717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56936721.

It is not an unprimeable number, because it can be changed into a prime (56936021) 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, 8980 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (9493848).

Almost surely, 2^56936721 is an apocalyptic number.

It is an amenable number.

56936721 is a deficient number, since it is larger than the sum of its proper divisors (19014063).

56936721 is a wasteful number, since it uses less digits than its factorization.

56936721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791.

The product of its digits is 68040, while the sum is 39.

The square root of 56936721 is about 7545.6425173739. The cubic root of 56936721 is about 384.7076455971.

The spelling of 56936721 in words is "fifty-six million, nine hundred thirty-six thousand, seven hundred twenty-one".