679561684 has 12 divisors (see below), whose sum is σ = 1221374644. Its totient is φ = 330597504.

The previous prime is 679561681. The next prime is 679561691. The reversal of 679561684 is 486165976.

It can be written as a sum of positive squares in 2 ways, for example, as 491597584 + 187964100 = 22172^2 + 13710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679561681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2295669 + ... + 2295964.

Almost surely, 2^679561684 is an apocalyptic number.

It is an amenable number.

679561684 is a deficient number, since it is larger than the sum of its proper divisors (541812960).

679561684 is a wasteful number, since it uses less digits than its factorization.

679561684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591674 (or 4591672 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 679561684 is about 26068.4039404026. The cubic root of 679561684 is about 879.1769525667.

The spelling of 679561684 in words is "six hundred seventy-nine million, five hundred sixty-one thousand, six hundred eighty-four".