57668309 has 2 divisors, whose sum is σ = 57668310. Its totient is φ = 57668308.

The previous prime is 57668297. The next prime is 57668329. The reversal of 57668309 is 90386675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56175025 + 1493284 = 7495^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 57668309 - 2⁸ = 57668053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57668309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57668329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28834154 + 28834155.

It is an arithmetic number, because the mean of its divisors is an integer number (28834155).

Almost surely, 2^57668309 is an apocalyptic number.

It is an amenable number.

57668309 is a deficient number, since it is larger than the sum of its proper divisors (1).

57668309 is an equidigital number, since it uses as much as digits as its factorization.

57668309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 57668309 is about 7593.9653014746. The cubic root of 57668309 is about 386.3483593062.

The spelling of 57668309 in words is "fifty-seven million, six hundred sixty-eight thousand, three hundred nine".