557639539 has 2 divisors, whose sum is σ = 557639540. Its totient is φ = 557639538.

The previous prime is 557639513. The next prime is 557639561. The reversal of 557639539 is 935936755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557639539 - 2²³ = 549250931 is a prime.

It is a super-2 number, since 2×557639539² = 621923710912265042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557639039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278819769 + 278819770.

It is an arithmetic number, because the mean of its divisors is an integer number (278819770).

Almost surely, 2^557639539 is an apocalyptic number.

557639539 is a deficient number, since it is larger than the sum of its proper divisors (1).

557639539 is an equidigital number, since it uses as much as digits as its factorization.

557639539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3827250, while the sum is 52.

The square root of 557639539 is about 23614.3926239910. The cubic root of 557639539 is about 823.0973178548.

The spelling of 557639539 in words is "five hundred fifty-seven million, six hundred thirty-nine thousand, five hundred thirty-nine".