557538797 has 2 divisors, whose sum is σ = 557538798. Its totient is φ = 557538796.

The previous prime is 557538757. The next prime is 557538803. The reversal of 557538797 is 797835755.

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., 477597316 + 79941481 = 21854^2 + 8941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557538797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557538757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278769398 + 278769399.

It is an arithmetic number, because the mean of its divisors is an integer number (278769399).

Almost surely, 2^557538797 is an apocalyptic number.

It is an amenable number.

557538797 is a deficient number, since it is larger than the sum of its proper divisors (1).

557538797 is an equidigital number, since it uses as much as digits as its factorization.

557538797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9261000, while the sum is 56.

The square root of 557538797 is about 23612.2594641004. The cubic root of 557538797 is about 823.0477485194.

The spelling of 557538797 in words is "five hundred fifty-seven million, five hundred thirty-eight thousand, seven hundred ninety-seven".