56401867 has 2 divisors, whose sum is σ = 56401868. Its totient is φ = 56401866.

The previous prime is 56401859. The next prime is 56401871. The reversal of 56401867 is 76810465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56401867 - 2³ = 56401859 is a prime.

It is not a weakly prime, because it can be changed into another prime (56401837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28200933 + 28200934.

It is an arithmetic number, because the mean of its divisors is an integer number (28200934).

Almost surely, 2^56401867 is an apocalyptic number.

56401867 is a deficient number, since it is larger than the sum of its proper divisors (1).

56401867 is an equidigital number, since it uses as much as digits as its factorization.

56401867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 56401867 is about 7510.1176422211. The cubic root of 56401867 is about 383.4992274190.

The spelling of 56401867 in words is "fifty-six million, four hundred one thousand, eight hundred sixty-seven".