56604209 has 2 divisors, whose sum is σ = 56604210. Its totient is φ = 56604208.

The previous prime is 56604193. The next prime is 56604217. The reversal of 56604209 is 90240665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42706225 + 13897984 = 6535^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 56604209 - 2⁴ = 56604193 is a prime.

It is not a weakly prime, because it can be changed into another prime (56604239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28302104 + 28302105.

It is an arithmetic number, because the mean of its divisors is an integer number (28302105).

Almost surely, 2^56604209 is an apocalyptic number.

It is an amenable number.

56604209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56604209 is an equidigital number, since it uses as much as digits as its factorization.

56604209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 56604209 is about 7523.5768753964. The cubic root of 56604209 is about 383.9572819414.

The spelling of 56604209 in words is "fifty-six million, six hundred four thousand, two hundred nine".