56915009 has 4 divisors (see below), whose sum is σ = 57600816. Its totient is φ = 56229204.

The previous prime is 56914993. The next prime is 56915021. The reversal of 56915009 is 90051965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56915009 - 2⁴ = 56914993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56915009.

It is not an unprimeable number, because it can be changed into a prime (56915059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342779 + ... + 342944.

It is an arithmetic number, because the mean of its divisors is an integer number (14400204).

Almost surely, 2^56915009 is an apocalyptic number.

It is an amenable number.

56915009 is a deficient number, since it is larger than the sum of its proper divisors (685807).

56915009 is an equidigital number, since it uses as much as digits as its factorization.

56915009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685806.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 56915009 is about 7544.2036690429. The cubic root of 56915009 is about 384.6587384699.

The spelling of 56915009 in words is "fifty-six million, nine hundred fifteen thousand, nine".