568660813 has 4 divisors (see below), whose sum is σ = 649898080. Its totient is φ = 487423548.

The previous prime is 568660811. The next prime is 568660819. The reversal of 568660813 is 318066865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 568660813 - 2¹ = 568660811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 568660813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568660811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40618623 + ... + 40618636.

It is an arithmetic number, because the mean of its divisors is an integer number (162474520).

Almost surely, 2^568660813 is an apocalyptic number.

It is an amenable number.

568660813 is a deficient number, since it is larger than the sum of its proper divisors (81237267).

568660813 is an equidigital number, since it uses as much as digits as its factorization.

568660813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81237266.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 568660813 is about 23846.6100945187. The cubic root of 568660813 is about 828.4845881172.

The spelling of 568660813 in words is "five hundred sixty-eight million, six hundred sixty thousand, eight hundred thirteen".