56390997 has 16 divisors (see below), whose sum is σ = 83162240. Its totient is φ = 33763392.

The previous prime is 56390959. The next prime is 56391001. The reversal of 56390997 is 79909365.

It is a happy number.

It is not a de Polignac number, because 56390997 - 2⁷ = 56390869 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 (56390927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18097 + ... + 20982.

It is an arithmetic number, because the mean of its divisors is an integer number (5197640).

Almost surely, 2^56390997 is an apocalyptic number.

It is an amenable number.

56390997 is a deficient number, since it is larger than the sum of its proper divisors (26771243).

56390997 is a wasteful number, since it uses less digits than its factorization.

56390997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39132.

The product of its (nonzero) digits is 459270, while the sum is 48.

The square root of 56390997 is about 7509.3939169549. The cubic root of 56390997 is about 383.4745893195.

The spelling of 56390997 in words is "fifty-six million, three hundred ninety thousand, nine hundred ninety-seven".