56969581 has 4 divisors (see below), whose sum is σ = 59968000. Its totient is φ = 53971164.

The previous prime is 56969579. The next prime is 56969621. The reversal of 56969581 is 18596965.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18596965 = 5 ⋅3719393.

It is a cyclic number.

It is not a de Polignac number, because 56969581 - 2¹ = 56969579 is a prime.

It is a super-2 number, since 2×56969581² = 6491066318631122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56969531) 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, 1499181 + ... + 1499218.

It is an arithmetic number, because the mean of its divisors is an integer number (14992000).

Almost surely, 2^56969581 is an apocalyptic number.

It is an amenable number.

56969581 is a deficient number, since it is larger than the sum of its proper divisors (2998419).

56969581 is a wasteful number, since it uses less digits than its factorization.

56969581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998418.

The product of its digits is 583200, while the sum is 49.

The square root of 56969581 is about 7547.8196189363. The cubic root of 56969581 is about 384.7816403867.

The spelling of 56969581 in words is "fifty-six million, nine hundred sixty-nine thousand, five hundred eighty-one".