56610409 has 2 divisors, whose sum is σ = 56610410. Its totient is φ = 56610408.

The previous prime is 56610347. The next prime is 56610427. The reversal of 56610409 is 90401665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44555625 + 12054784 = 6675^2 + 3472^2 .

It is a cyclic number.

It is not a de Polignac number, because 56610409 - 2²¹ = 54513257 is a prime.

It is not a weakly prime, because it can be changed into another prime (56610439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28305204 + 28305205.

It is an arithmetic number, because the mean of its divisors is an integer number (28305205).

Almost surely, 2^56610409 is an apocalyptic number.

It is an amenable number.

56610409 is a deficient number, since it is larger than the sum of its proper divisors (1).

56610409 is an equidigital number, since it uses as much as digits as its factorization.

56610409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 56610409 is about 7523.9889021715. The cubic root of 56610409 is about 383.9713000288.

The spelling of 56610409 in words is "fifty-six million, six hundred ten thousand, four hundred nine".