679698686 has 4 divisors (see below), whose sum is σ = 1019548032. Its totient is φ = 339849342.

The previous prime is 679698667. The next prime is 679698707. The reversal of 679698686 is 686896976.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169924670 + ... + 169924673.

It is an arithmetic number, because the mean of its divisors is an integer number (254887008).

Almost surely, 2^679698686 is an apocalyptic number.

679698686 is a deficient number, since it is larger than the sum of its proper divisors (339849346).

679698686 is a wasteful number, since it uses less digits than its factorization.

679698686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339849345.

The product of its digits is 47029248, while the sum is 65.

The square root of 679698686 is about 26071.0315484447. The cubic root of 679698686 is about 879.2360303076.

The spelling of 679698686 in words is "six hundred seventy-nine million, six hundred ninety-eight thousand, six hundred eighty-six".