56635609 has 2 divisors, whose sum is σ = 56635610. Its totient is φ = 56635608.

The previous prime is 56635603. The next prime is 56635613. The reversal of 56635609 is 90653665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51883209 + 4752400 = 7203^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 56635609 - 2⁹ = 56635097 is a prime.

It is not a weakly prime, because it can be changed into another prime (56635603) 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 as a sum of consecutive naturals, namely, 28317804 + 28317805.

It is an arithmetic number, because the mean of its divisors is an integer number (28317805).

Almost surely, 2^56635609 is an apocalyptic number.

It is an amenable number.

56635609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56635609 is an equidigital number, since it uses as much as digits as its factorization.

56635609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 56635609 is about 7525.6633594654. The cubic root of 56635609 is about 384.0282662389.

The spelling of 56635609 in words is "fifty-six million, six hundred thirty-five thousand, six hundred nine".