679438718 has 32 divisors (see below), whose sum is σ = 1207664640. Its totient is φ = 280543680.

The previous prime is 679438717. The next prime is 679438723. The reversal of 679438718 is 817834976.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 679438718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679438717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97763 + ... + 104481.

It is an arithmetic number, because the mean of its divisors is an integer number (37739520).

Almost surely, 2^679438718 is an apocalyptic number.

679438718 is a deficient number, since it is larger than the sum of its proper divisors (528225922).

679438718 is a wasteful number, since it uses less digits than its factorization.

679438718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6992.

The product of its digits is 2032128, while the sum is 53.

The square root of 679438718 is about 26066.0453080248. The cubic root of 679438718 is about 879.1239206408.

The spelling of 679438718 in words is "six hundred seventy-nine million, four hundred thirty-eight thousand, seven hundred eighteen".