557293397 has 2 divisors, whose sum is σ = 557293398. Its totient is φ = 557293396.

The previous prime is 557293367. The next prime is 557293423. The reversal of 557293397 is 793392755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555120721 + 2172676 = 23561^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 557293397 - 2⁶ = 557293333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557293307) 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, 278646698 + 278646699.

It is an arithmetic number, because the mean of its divisors is an integer number (278646699).

Almost surely, 2^557293397 is an apocalyptic number.

It is an amenable number.

557293397 is a deficient number, since it is larger than the sum of its proper divisors (1).

557293397 is an equidigital number, since it uses as much as digits as its factorization.

557293397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 50.

The square root of 557293397 is about 23607.0624390245. The cubic root of 557293397 is about 822.9269763215.

The spelling of 557293397 in words is "five hundred fifty-seven million, two hundred ninety-three thousand, three hundred ninety-seven".