56905903 has 4 divisors (see below), whose sum is σ = 56921688. Its totient is φ = 56890120.

The previous prime is 56905897. The next prime is 56905921. The reversal of 56905903 is 30950965.

56905903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56905903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56905993) 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 in 3 ways as a sum of consecutive naturals, for example, 468 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (14230422).

Almost surely, 2^56905903 is an apocalyptic number.

56905903 is a deficient number, since it is larger than the sum of its proper divisors (15785).

56905903 is a wasteful number, since it uses less digits than its factorization.

56905903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15784.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 56905903 is about 7543.6001352140. The cubic root of 56905903 is about 384.6382231474.

The spelling of 56905903 in words is "fifty-six million, nine hundred five thousand, nine hundred three".