56809073 has 2 divisors, whose sum is σ = 56809074. Its totient is φ = 56809072.

The previous prime is 56809021. The next prime is 56809133. The reversal of 56809073 is 37090865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56806369 + 2704 = 7537^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 56809073 - 2⁶ = 56809009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56809013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28404536 + 28404537.

It is an arithmetic number, because the mean of its divisors is an integer number (28404537).

Almost surely, 2^56809073 is an apocalyptic number.

It is an amenable number.

56809073 is a deficient number, since it is larger than the sum of its proper divisors (1).

56809073 is an equidigital number, since it uses as much as digits as its factorization.

56809073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 56809073 is about 7537.1793795823. The cubic root of 56809073 is about 384.4199349322.

The spelling of 56809073 in words is "fifty-six million, eight hundred nine thousand, seventy-three".