679680513 has 6 divisors (see below), whose sum is σ = 981760754. Its totient is φ = 453120336.

The previous prime is 679680479. The next prime is 679680527. The reversal of 679680513 is 315086976.

It is a happy number.

679680513 is a `hidden beast` number, since 6 + 79 + 68 + 0 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 534164544 + 145515969 = 23112^2 + 12063^2 .

It is not a de Polignac number, because 679680513 - 2⁸ = 679680257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679680563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37760020 + ... + 37760037.

Almost surely, 2^679680513 is an apocalyptic number.

It is an amenable number.

679680513 is a deficient number, since it is larger than the sum of its proper divisors (302080241).

679680513 is a wasteful number, since it uses less digits than its factorization.

679680513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75520063 (or 75520060 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 679680513 is about 26070.6830175199. The cubic root of 679680513 is about 879.2281942380.

The spelling of 679680513 in words is "six hundred seventy-nine million, six hundred eighty thousand, five hundred thirteen".