56649587 has 4 divisors (see below), whose sum is σ = 57210576. Its totient is φ = 56088600.

The previous prime is 56649581. The next prime is 56649599. The reversal of 56649587 is 78594665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56649587 - 2²² = 52455283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56649581) 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, 280343 + ... + 280544.

It is an arithmetic number, because the mean of its divisors is an integer number (14302644).

Almost surely, 2^56649587 is an apocalyptic number.

56649587 is a deficient number, since it is larger than the sum of its proper divisors (560989).

56649587 is a wasteful number, since it uses less digits than its factorization.

56649587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560988.

The product of its digits is 1814400, while the sum is 50.

The square root of 56649587 is about 7526.5919910674. The cubic root of 56649587 is about 384.0598571151.

It can be divided in two parts, 5664 and 9587, that added together give a palindrome (15251).

The spelling of 56649587 in words is "fifty-six million, six hundred forty-nine thousand, five hundred eighty-seven".