568328981 has 4 divisors (see below), whose sum is σ = 619995264. Its totient is φ = 516662700.

The previous prime is 568328953. The next prime is 568329001. The reversal of 568328981 is 189823865.

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 568328981 - 2²² = 564134677 is a prime.

It is a super-2 number, since 2×568328981² = 645995661288996722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568328881) 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, 25833125 + ... + 25833146.

It is an arithmetic number, because the mean of its divisors is an integer number (154998816).

Almost surely, 2^568328981 is an apocalyptic number.

It is an amenable number.

568328981 is a deficient number, since it is larger than the sum of its proper divisors (51666283).

568328981 is a wasteful number, since it uses less digits than its factorization.

568328981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51666282.

The product of its digits is 829440, while the sum is 50.

The square root of 568328981 is about 23839.6514445996. The cubic root of 568328981 is about 828.3234075662.

The spelling of 568328981 in words is "five hundred sixty-eight million, three hundred twenty-eight thousand, nine hundred eighty-one".