57297809 has 2 divisors, whose sum is σ = 57297810. Its totient is φ = 57297808.

The previous prime is 57297763. The next prime is 57297811. The reversal of 57297809 is 90879275.

57297809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57047809 + 250000 = 7553^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 57297809 - 2²⁴ = 40520593 is a prime.

Together with 57297811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57297839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28648904 + 28648905.

It is an arithmetic number, because the mean of its divisors is an integer number (28648905).

Almost surely, 2^57297809 is an apocalyptic number.

It is an amenable number.

57297809 is a deficient number, since it is larger than the sum of its proper divisors (1).

57297809 is an equidigital number, since it uses as much as digits as its factorization.

57297809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 57297809 is about 7569.5316235551. The cubic root of 57297809 is about 385.5191938285.

The spelling of 57297809 in words is "fifty-seven million, two hundred ninety-seven thousand, eight hundred nine".