568721399 has 4 divisors (see below), whose sum is σ = 571668336. Its totient is φ = 565774464.

The previous prime is 568721369. The next prime is 568721423. The reversal of 568721399 is 993127865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993127865 = 5 ⋅198625573.

It is a cyclic number.

It is not a de Polignac number, because 568721399 - 2⁸ = 568721143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568721359) 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, 1473179 + ... + 1473564.

It is an arithmetic number, because the mean of its divisors is an integer number (142917084).

Almost surely, 2^568721399 is an apocalyptic number.

568721399 is a deficient number, since it is larger than the sum of its proper divisors (2946937).

568721399 is a wasteful number, since it uses less digits than its factorization.

568721399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946936.

The product of its digits is 816480, while the sum is 50.

The square root of 568721399 is about 23847.8803879926. The cubic root of 568721399 is about 828.5140097476.

The spelling of 568721399 in words is "five hundred sixty-eight million, seven hundred twenty-one thousand, three hundred ninety-nine".