557791061 has 2 divisors, whose sum is σ = 557791062. Its totient is φ = 557791060.

The previous prime is 557791051. The next prime is 557791067. The reversal of 557791061 is 160197755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404774161 + 153016900 = 20119^2 + 12370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557791061 is a prime.

It is a super-2 number, since 2×557791061² = 622261735463011442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557791067) 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, 278895530 + 278895531.

It is an arithmetic number, because the mean of its divisors is an integer number (278895531).

Almost surely, 2^557791061 is an apocalyptic number.

It is an amenable number.

557791061 is a deficient number, since it is larger than the sum of its proper divisors (1).

557791061 is an equidigital number, since it uses as much as digits as its factorization.

557791061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 41.

The square root of 557791061 is about 23617.6006613712. The cubic root of 557791061 is about 823.1718618620.

The spelling of 557791061 in words is "five hundred fifty-seven million, seven hundred ninety-one thousand, sixty-one".