56605609 has 2 divisors, whose sum is σ = 56605610. Its totient is φ = 56605608.

The previous prime is 56605589. The next prime is 56605613. The reversal of 56605609 is 90650665.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37552384 + 19053225 = 6128^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 56605609 - 2¹⁹ = 56081321 is a prime.

It is not a weakly prime, because it can be changed into another prime (56605639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28302804 + 28302805.

It is an arithmetic number, because the mean of its divisors is an integer number (28302805).

Almost surely, 2^56605609 is an apocalyptic number.

It is an amenable number.

56605609 is a deficient number, since it is larger than the sum of its proper divisors (1).

56605609 is an equidigital number, since it uses as much as digits as its factorization.

56605609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 56605609 is about 7523.6699156728. The cubic root of 56605609 is about 383.9604474055.

The spelling of 56605609 in words is "fifty-six million, six hundred five thousand, six hundred nine".