568312991 has 2 divisors, whose sum is σ = 568312992. Its totient is φ = 568312990.

The previous prime is 568312981. The next prime is 568312993. The reversal of 568312991 is 199213865.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 568312991 - 2¹⁰ = 568311967 is a prime.

Together with 568312993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (568312993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284156495 + 284156496.

It is an arithmetic number, because the mean of its divisors is an integer number (284156496).

Almost surely, 2^568312991 is an apocalyptic number.

568312991 is a deficient number, since it is larger than the sum of its proper divisors (1).

568312991 is an equidigital number, since it uses as much as digits as its factorization.

568312991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The square root of 568312991 is about 23839.3160765992. The cubic root of 568312991 is about 828.3156391691.

The spelling of 568312991 in words is "five hundred sixty-eight million, three hundred twelve thousand, nine hundred ninety-one".