56957909 has 2 divisors, whose sum is σ = 56957910. Its totient is φ = 56957908.

The previous prime is 56957903. The next prime is 56957941. The reversal of 56957909 is 90975965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42289009 + 14668900 = 6503^2 + 3830^2 .

It is a cyclic number.

It is not a de Polignac number, because 56957909 - 2⁴ = 56957893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56957903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28478954 + 28478955.

It is an arithmetic number, because the mean of its divisors is an integer number (28478955).

Almost surely, 2^56957909 is an apocalyptic number.

It is an amenable number.

56957909 is a deficient number, since it is larger than the sum of its proper divisors (1).

56957909 is an equidigital number, since it uses as much as digits as its factorization.

56957909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 56957909 is about 7547.0463759010. The cubic root of 56957909 is about 384.7553604084.

The spelling of 56957909 in words is "fifty-six million, nine hundred fifty-seven thousand, nine hundred nine".