56904391 has 2 divisors, whose sum is σ = 56904392. Its totient is φ = 56904390.

The previous prime is 56904383. The next prime is 56904403. The reversal of 56904391 is 19340965.

56904391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56904391 - 2³ = 56904383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56904391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56904301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28452195 + 28452196.

It is an arithmetic number, because the mean of its divisors is an integer number (28452196).

Almost surely, 2^56904391 is an apocalyptic number.

56904391 is a deficient number, since it is larger than the sum of its proper divisors (1).

56904391 is an equidigital number, since it uses as much as digits as its factorization.

56904391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 56904391 is about 7543.4999171472. The cubic root of 56904391 is about 384.6348164818.

The spelling of 56904391 in words is "fifty-six million, nine hundred four thousand, three hundred ninety-one".