568679409 has 9 divisors (see below), whose sum is σ = 821529163. Its totient is φ = 379071912.

The previous prime is 568679401. The next prime is 568679411. The reversal of 568679409 is 904976865.

The square root of 568679409 is 23847.

It is a perfect power (a square), and thus also a powerful number.

568679409 is a `hidden beast` number, since 568 + 6 + 79 + 4 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 272151009 + 296528400 = 16497^2 + 17220^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 568679409 - 2³ = 568679401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (568679401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 67567 + ... + 75515.

Almost surely, 2^568679409 is an apocalyptic number.

568679409 is the 23847-th square number.

568679409 is the 11924-th centered octagonal number.

It is an amenable number.

568679409 is a deficient number, since it is larger than the sum of its proper divisors (252849754).

568679409 is an frugal number, since it uses more digits than its factorization.

568679409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15904 (or 7952 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The cubic root of 568679409 is about 828.4936188851.

The spelling of 568679409 in words is "five hundred sixty-eight million, six hundred seventy-nine thousand, four hundred nine".