564087491 has 4 divisors (see below), whose sum is σ = 615368184. Its totient is φ = 512806800.

The previous prime is 564087487. The next prime is 564087493. The reversal of 564087491 is 194780465.

564087491 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 not a de Polignac number, because 564087491 - 2² = 564087487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564087493) 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, 25640330 + ... + 25640351.

It is an arithmetic number, because the mean of its divisors is an integer number (153842046).

Almost surely, 2^564087491 is an apocalyptic number.

564087491 is a deficient number, since it is larger than the sum of its proper divisors (51280693).

564087491 is a wasteful number, since it uses less digits than its factorization.

564087491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51280692.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 564087491 is about 23750.5261204884. The cubic root of 564087491 is about 826.2576427984.

The spelling of 564087491 in words is "five hundred sixty-four million, eighty-seven thousand, four hundred ninety-one".