557286491 has 2 divisors, whose sum is σ = 557286492. Its totient is φ = 557286490.

The previous prime is 557286479. The next prime is 557286517. The reversal of 557286491 is 194682755.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557286491 - 2⁶ = 557286427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (557286451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278643245 + 278643246.

It is an arithmetic number, because the mean of its divisors is an integer number (278643246).

Almost surely, 2^557286491 is an apocalyptic number.

557286491 is a deficient number, since it is larger than the sum of its proper divisors (1).

557286491 is an equidigital number, since it uses as much as digits as its factorization.

557286491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 557286491 is about 23606.9161687841. The cubic root of 557286491 is about 822.9235770605.

The spelling of 557286491 in words is "five hundred fifty-seven million, two hundred eighty-six thousand, four hundred ninety-one".