57665009 has 2 divisors, whose sum is σ = 57665010. Its totient is φ = 57665008.

The previous prime is 57664987. The next prime is 57665011. The reversal of 57665009 is 90056675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 5536609 = 7220^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 57665009 - 2¹² = 57660913 is a prime.

Together with 57665011, 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 (57665089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28832504 + 28832505.

It is an arithmetic number, because the mean of its divisors is an integer number (28832505).

Almost surely, 2^57665009 is an apocalyptic number.

It is an amenable number.

57665009 is a deficient number, since it is larger than the sum of its proper divisors (1).

57665009 is an equidigital number, since it uses as much as digits as its factorization.

57665009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 57665009 is about 7593.7480205759. The cubic root of 57665009 is about 386.3409897247.

The spelling of 57665009 in words is "fifty-seven million, six hundred sixty-five thousand, nine".