568309997 has 4 divisors (see below), whose sum is σ = 568578816. Its totient is φ = 568041180.

The previous prime is 568309993. The next prime is 568310003. The reversal of 568309997 is 799903865.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799903865 = 5 ⋅159980773.

It is a cyclic number.

It is not a de Polignac number, because 568309997 - 2² = 568309993 is a prime.

It is a super-3 number, since 3×568309997³ (a number of 27 digits) contains 333 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 (568309991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131213 + ... + 135474.

It is an arithmetic number, because the mean of its divisors is an integer number (142144704).

Almost surely, 2^568309997 is an apocalyptic number.

It is an amenable number.

568309997 is a deficient number, since it is larger than the sum of its proper divisors (268819).

568309997 is a wasteful number, since it uses less digits than its factorization.

568309997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268818.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 568309997 is about 23839.2532810908. The cubic root of 568309997 is about 828.3141845825.

The spelling of 568309997 in words is "five hundred sixty-eight million, three hundred nine thousand, nine hundred ninety-seven".