557994557 has 2 divisors, whose sum is σ = 557994558. Its totient is φ = 557994556.

The previous prime is 557994533. The next prime is 557994571. The reversal of 557994557 is 755499755.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417548356 + 140446201 = 20434^2 + 11851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557994557 is a prime.

It is a super-2 number, since 2×557994557² = 622715851283252498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557994517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278997278 + 278997279.

It is an arithmetic number, because the mean of its divisors is an integer number (278997279).

Almost surely, 2^557994557 is an apocalyptic number.

It is an amenable number.

557994557 is a deficient number, since it is larger than the sum of its proper divisors (1).

557994557 is an equidigital number, since it uses as much as digits as its factorization.

557994557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9922500, while the sum is 56.

The square root of 557994557 is about 23621.9084114726. The cubic root of 557994557 is about 823.2719541882.

The spelling of 557994557 in words is "five hundred fifty-seven million, nine hundred ninety-four thousand, five hundred fifty-seven".