56685839 has 4 divisors (see below), whose sum is σ = 64783824. Its totient is φ = 48587856.

The previous prime is 56685833. The next prime is 56685859. The reversal of 56685839 is 93858665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93858665 = 5 ⋅18771733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56685839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56685833) 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, 4048982 + ... + 4048995.

It is an arithmetic number, because the mean of its divisors is an integer number (16195956).

Almost surely, 2^56685839 is an apocalyptic number.

56685839 is a deficient number, since it is larger than the sum of its proper divisors (8097985).

56685839 is an equidigital number, since it uses as much as digits as its factorization.

56685839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097984.

The product of its digits is 1555200, while the sum is 50.

The square root of 56685839 is about 7528.9998671802. Note that the first 3 decimals coincide. The cubic root of 56685839 is about 384.1417639734.

The spelling of 56685839 in words is "fifty-six million, six hundred eighty-five thousand, eight hundred thirty-nine".