56878589 has 2 divisors, whose sum is σ = 56878590. Its totient is φ = 56878588.

The previous prime is 56878567. The next prime is 56878621. The reversal of 56878589 is 98587865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47472100 + 9406489 = 6890^2 + 3067^2 .

It is a cyclic number.

It is not a de Polignac number, because 56878589 - 2²⁰ = 55830013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56878559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28439294 + 28439295.

It is an arithmetic number, because the mean of its divisors is an integer number (28439295).

Almost surely, 2^56878589 is an apocalyptic number.

It is an amenable number.

56878589 is a deficient number, since it is larger than the sum of its proper divisors (1).

56878589 is an equidigital number, since it uses as much as digits as its factorization.

56878589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 56.

The square root of 56878589 is about 7541.7895091285. The cubic root of 56878589 is about 384.5766730607.

The spelling of 56878589 in words is "fifty-six million, eight hundred seventy-eight thousand, five hundred eighty-nine".