56909869 has 4 divisors (see below), whose sum is σ = 57462496. Its totient is φ = 56357244.

The previous prime is 56909849. The next prime is 56909873. The reversal of 56909869 is 96890965.

It is a happy number.

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 56909869 - 2⁹ = 56909357 is a prime.

It is a super-2 number, since 2×56909869² = 6477466379194322, 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 (56909819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276159 + ... + 276364.

It is an arithmetic number, because the mean of its divisors is an integer number (14365624).

Almost surely, 2^56909869 is an apocalyptic number.

It is an amenable number.

56909869 is a deficient number, since it is larger than the sum of its proper divisors (552627).

56909869 is a wasteful number, since it uses less digits than its factorization.

56909869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552626.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 56909869 is about 7543.8630024676. The cubic root of 56909869 is about 384.6471585986.

The spelling of 56909869 in words is "fifty-six million, nine hundred nine thousand, eight hundred sixty-nine".