679931 has 8 divisors (see below), whose sum is σ = 783840. Its totient is φ = 577728.

The previous prime is 679919. The next prime is 679933. The reversal of 679931 is 139976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 679931 - 2⁶ = 679867 is a prime.

It is a super-2 number, since 2×679931² = 924612329522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679891 and 679900.

It is not an unprimeable number, because it can be changed into a prime (679933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (97980).

2⁶⁷⁹⁹³¹ is an apocalyptic number.

679931 is a deficient number, since it is larger than the sum of its proper divisors (103909).

679931 is a wasteful number, since it uses less digits than its factorization.

679931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its digits is 10206, while the sum is 35.

The square root of 679931 is about 824.5792866668. The cubic root of 679931 is about 87.9336190166.

The spelling of 679931 in words is "six hundred seventy-nine thousand, nine hundred thirty-one".