56609863 has 2 divisors, whose sum is σ = 56609864. Its totient is φ = 56609862.

The previous prime is 56609857. The next prime is 56609893. The reversal of 56609863 is 36890665.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56609863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56609803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28304931 + 28304932.

It is an arithmetic number, because the mean of its divisors is an integer number (28304932).

Almost surely, 2^56609863 is an apocalyptic number.

56609863 is a deficient number, since it is larger than the sum of its proper divisors (1).

56609863 is an equidigital number, since it uses as much as digits as its factorization.

56609863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 56609863 is about 7523.9526181390. The cubic root of 56609863 is about 383.9700655738.

The spelling of 56609863 in words is "fifty-six million, six hundred nine thousand, eight hundred sixty-three".