557797091 has 2 divisors, whose sum is σ = 557797092. Its totient is φ = 557797090.

The previous prime is 557797039. The next prime is 557797109. The reversal of 557797091 is 190797755.

Together with next prime (557797109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557797091 - 2¹⁰ = 557796067 is a prime.

It is a super-2 number, since 2×557797091² = 622275189456124562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (557797001) 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, 278898545 + 278898546.

It is an arithmetic number, because the mean of its divisors is an integer number (278898546).

Almost surely, 2^557797091 is an apocalyptic number.

557797091 is a deficient number, since it is larger than the sum of its proper divisors (1).

557797091 is an equidigital number, since it uses as much as digits as its factorization.

557797091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 694575, while the sum is 50.

The square root of 557797091 is about 23617.7283200565. The cubic root of 557797091 is about 823.1748281509.

The spelling of 557797091 in words is "five hundred fifty-seven million, seven hundred ninety-seven thousand, ninety-one".