557315917 has 2 divisors, whose sum is σ = 557315918. Its totient is φ = 557315916.

The previous prime is 557315903. The next prime is 557315929. The reversal of 557315917 is 719513755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474760521 + 82555396 = 21789^2 + 9086^2 .

It is a cyclic number.

It is not a de Polignac number, because 557315917 - 2¹⁹ = 556791629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557315977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278657958 + 278657959.

It is an arithmetic number, because the mean of its divisors is an integer number (278657959).

Almost surely, 2^557315917 is an apocalyptic number.

It is an amenable number.

557315917 is a deficient number, since it is larger than the sum of its proper divisors (1).

557315917 is an equidigital number, since it uses as much as digits as its factorization.

557315917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165375, while the sum is 43.

The square root of 557315917 is about 23607.5394101122. The cubic root of 557315917 is about 822.9380608872.

The spelling of 557315917 in words is "five hundred fifty-seven million, three hundred fifteen thousand, nine hundred seventeen".