56918609 has 4 divisors (see below), whose sum is σ = 62093040. Its totient is φ = 51744180.

The previous prime is 56918593. The next prime is 56918621. The reversal of 56918609 is 90681965.

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 56918609 - 2⁴ = 56918593 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 56918609.

It is not an unprimeable number, because it can be changed into a prime (56918639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2587199 + ... + 2587220.

It is an arithmetic number, because the mean of its divisors is an integer number (15523260).

Almost surely, 2^56918609 is an apocalyptic number.

It is an amenable number.

56918609 is a deficient number, since it is larger than the sum of its proper divisors (5174431).

56918609 is a wasteful number, since it uses less digits than its factorization.

56918609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174430.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 56918609 is about 7544.4422590408. The cubic root of 56918609 is about 384.6668484704. Note that the first 3 decimals are identical.

The spelling of 56918609 in words is "fifty-six million, nine hundred eighteen thousand, six hundred nine".