57565909 has 2 divisors, whose sum is σ = 57565910. Its totient is φ = 57565908.

The previous prime is 57565903. The next prime is 57565913. The reversal of 57565909 is 90956575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31606884 + 25959025 = 5622^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 57565909 - 2³ = 57565901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57565901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28782954 + 28782955.

It is an arithmetic number, because the mean of its divisors is an integer number (28782955).

Almost surely, 2^57565909 is an apocalyptic number.

It is an amenable number.

57565909 is a deficient number, since it is larger than the sum of its proper divisors (1).

57565909 is an equidigital number, since it uses as much as digits as its factorization.

57565909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 425250, while the sum is 46.

The square root of 57565909 is about 7587.2201101589. The cubic root of 57565909 is about 386.1195478369.

The spelling of 57565909 in words is "fifty-seven million, five hundred sixty-five thousand, nine hundred nine".