568428009 has 4 divisors (see below), whose sum is σ = 757904016. Its totient is φ = 378952004.

The previous prime is 568427983. The next prime is 568428017. The reversal of 568428009 is 900824865.

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 568428009 - 2²¹ = 566330857 is a prime.

It is a super-2 number, since 2×568428009² = 646220802831408162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (568428019) 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, 94737999 + ... + 94738004.

It is an arithmetic number, because the mean of its divisors is an integer number (189476004).

Almost surely, 2^568428009 is an apocalyptic number.

It is an amenable number.

568428009 is a deficient number, since it is larger than the sum of its proper divisors (189476007).

568428009 is a wasteful number, since it uses less digits than its factorization.

568428009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189476006.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 568428009 is about 23841.7283140296. The cubic root of 568428009 is about 828.3715149414.

The spelling of 568428009 in words is "five hundred sixty-eight million, four hundred twenty-eight thousand, nine".