56936909 has 4 divisors (see below), whose sum is σ = 57235200. Its totient is φ = 56638620.

The previous prime is 56936903. The next prime is 56936951. The reversal of 56936909 is 90963965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56936909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56936903) 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, 148859 + ... + 149240.

It is an arithmetic number, because the mean of its divisors is an integer number (14308800).

Almost surely, 2^56936909 is an apocalyptic number.

It is an amenable number.

56936909 is a deficient number, since it is larger than the sum of its proper divisors (298291).

56936909 is a wasteful number, since it uses less digits than its factorization.

56936909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298290.

The product of its (nonzero) digits is 393660, while the sum is 47.

The square root of 56936909 is about 7545.6549748846. The cubic root of 56936909 is about 384.7080690201.

The spelling of 56936909 in words is "fifty-six million, nine hundred thirty-six thousand, nine hundred nine".