57331409 has 2 divisors, whose sum is σ = 57331410. Its totient is φ = 57331408.

The previous prime is 57331381. The next prime is 57331411. The reversal of 57331409 is 90413375.

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., 55830784 + 1500625 = 7472^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 57331409 - 2²⁰ = 56282833 is a prime.

Together with 57331411, 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 (57331459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28665704 + 28665705.

It is an arithmetic number, because the mean of its divisors is an integer number (28665705).

Almost surely, 2^57331409 is an apocalyptic number.

It is an amenable number.

57331409 is a deficient number, since it is larger than the sum of its proper divisors (1).

57331409 is an equidigital number, since it uses as much as digits as its factorization.

57331409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 57331409 is about 7571.7507222570. The cubic root of 57331409 is about 385.5945365216.

The spelling of 57331409 in words is "fifty-seven million, three hundred thirty-one thousand, four hundred nine".