679698687 has 16 divisors (see below), whose sum is σ = 913882112. Its totient is φ = 449336160.

The previous prime is 679698667. The next prime is 679698707. The reversal of 679698687 is 786896976.

It is a happy number.

679698687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (679698667) and next prime (679698707).

It is not a de Polignac number, because 679698687 - 2⁸ = 679698431 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 (679698667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296058 + ... + 298344.

It is an arithmetic number, because the mean of its divisors is an integer number (57117632).

Almost surely, 2^679698687 is an apocalyptic number.

679698687 is a deficient number, since it is larger than the sum of its proper divisors (234183425).

679698687 is a wasteful number, since it uses less digits than its factorization.

679698687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078.

The product of its digits is 54867456, while the sum is 66.

The square root of 679698687 is about 26071.0315676231. The cubic root of 679698687 is about 879.2360307388.

The spelling of 679698687 in words is "six hundred seventy-nine million, six hundred ninety-eight thousand, six hundred eighty-seven".