679843997 has 16 divisors (see below), whose sum is σ = 826304640. Its totient is φ = 546352128.

The previous prime is 679843993. The next prime is 679843999. The reversal of 679843997 is 799348976.

It is not a de Polignac number, because 679843997 - 2² = 679843993 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679843993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13448 + ... + 39249.

It is an arithmetic number, because the mean of its divisors is an integer number (51644040).

Almost surely, 2^679843997 is an apocalyptic number.

It is an amenable number.

679843997 is a deficient number, since it is larger than the sum of its proper divisors (146460643).

679843997 is a wasteful number, since it uses less digits than its factorization.

679843997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52820.

The product of its digits is 20575296, while the sum is 62.

The square root of 679843997 is about 26073.8182282534. The cubic root of 679843997 is about 879.2986823650.

The spelling of 679843997 in words is "six hundred seventy-nine million, eight hundred forty-three thousand, nine hundred ninety-seven".