57431609 has 2 divisors, whose sum is σ = 57431610. Its totient is φ = 57431608.

The previous prime is 57431567. The next prime is 57431641. The reversal of 57431609 is 90613475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33028009 + 24403600 = 5747^2 + 4940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57431609 is a prime.

It is not a weakly prime, because it can be changed into another prime (57431669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28715804 + 28715805.

It is an arithmetic number, because the mean of its divisors is an integer number (28715805).

Almost surely, 2^57431609 is an apocalyptic number.

It is an amenable number.

57431609 is a deficient number, since it is larger than the sum of its proper divisors (1).

57431609 is an equidigital number, since it uses as much as digits as its factorization.

57431609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 57431609 is about 7578.3645333278. The cubic root of 57431609 is about 385.8190445546.

The spelling of 57431609 in words is "fifty-seven million, four hundred thirty-one thousand, six hundred nine".