568309993 has 2 divisors, whose sum is σ = 568309994. Its totient is φ = 568309992.

The previous prime is 568309991. The next prime is 568310003. The reversal of 568309993 is 399903865.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531440809 + 36869184 = 23053^2 + 6072^2 .

It is a cyclic number.

It is not a de Polignac number, because 568309993 - 2¹ = 568309991 is a prime.

Together with 568309991, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 568309993.

It is not a weakly prime, because it can be changed into another prime (568309991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284154996 + 284154997.

It is an arithmetic number, because the mean of its divisors is an integer number (284154997).

Almost surely, 2^568309993 is an apocalyptic number.

It is an amenable number.

568309993 is a deficient number, since it is larger than the sum of its proper divisors (1).

568309993 is an equidigital number, since it uses as much as digits as its factorization.

568309993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 568309993 is about 23839.2531971956. The cubic root of 568309993 is about 828.3141826392.

The spelling of 568309993 in words is "five hundred sixty-eight million, three hundred nine thousand, nine hundred ninety-three".