56579491 has 4 divisors (see below), whose sum is σ = 56597584. Its totient is φ = 56561400.

The previous prime is 56579483. The next prime is 56579521. The reversal of 56579491 is 19497565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19497565 = 5 ⋅3899513.

It is a cyclic number.

It is not a de Polignac number, because 56579491 - 2³ = 56579483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56579431) 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, 3015 + ... + 11056.

It is an arithmetic number, because the mean of its divisors is an integer number (14149396).

Almost surely, 2^56579491 is an apocalyptic number.

56579491 is the 4021-st nonagonal number.

56579491 is a deficient number, since it is larger than the sum of its proper divisors (18093).

56579491 is a wasteful number, since it uses less digits than its factorization.

56579491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18092.

The product of its digits is 340200, while the sum is 46.

The square root of 56579491 is about 7521.9339933291. The cubic root of 56579491 is about 383.9013848149.

The spelling of 56579491 in words is "fifty-six million, five hundred seventy-nine thousand, four hundred ninety-one".