557069391 has 12 divisors (see below), whose sum is σ = 805022400. Its totient is φ = 371210400.

The previous prime is 557069389. The next prime is 557069393. The reversal of 557069391 is 193960755.

557069391 is a `hidden beast` number, since 557 + 0 + 6 + 9 + 3 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (557069389) and next prime (557069393).

It is not a de Polignac number, because 557069391 - 2¹ = 557069389 is a prime.

It is a super-2 number, since 2×557069391² = 620652612778221762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557069393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8691 + ... + 34491.

It is an arithmetic number, because the mean of its divisors is an integer number (67085200).

Almost surely, 2^557069391 is an apocalyptic number.

557069391 is a deficient number, since it is larger than the sum of its proper divisors (247953009).

557069391 is a wasteful number, since it uses less digits than its factorization.

557069391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28206 (or 28203 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 557069391 is about 23602.3174921447. The cubic root of 557069391 is about 822.8167021011.

The spelling of 557069391 in words is "five hundred fifty-seven million, sixty-nine thousand, three hundred ninety-one".