56375809 has 4 divisors (see below), whose sum is σ = 64429504. Its totient is φ = 48322116.

The previous prime is 56375807. The next prime is 56375819. The reversal of 56375809 is 90857365.

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 56375809 - 2¹ = 56375807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56375801) 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, 4026837 + ... + 4026850.

It is an arithmetic number, because the mean of its divisors is an integer number (16107376).

Almost surely, 2^56375809 is an apocalyptic number.

It is an amenable number.

56375809 is a deficient number, since it is larger than the sum of its proper divisors (8053695).

56375809 is an equidigital number, since it uses as much as digits as its factorization.

56375809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8053694.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 56375809 is about 7508.3825821544. The cubic root of 56375809 is about 383.4401586755.

The spelling of 56375809 in words is "fifty-six million, three hundred seventy-five thousand, eight hundred nine".