679929861 has 8 divisors (see below), whose sum is σ = 976309600. Its totient is φ = 418418352.

The previous prime is 679929781. The next prime is 679929893. The reversal of 679929861 is 168929976.

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

It is not a de Polignac number, because 679929861 - 2¹⁴ = 679913477 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 (679921861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8717011 + ... + 8717088.

It is an arithmetic number, because the mean of its divisors is an integer number (122038700).

Almost surely, 2^679929861 is an apocalyptic number.

It is an amenable number.

679929861 is a deficient number, since it is larger than the sum of its proper divisors (296379739).

679929861 is a wasteful number, since it uses less digits than its factorization.

679929861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17434115.

The product of its digits is 2939328, while the sum is 57.

The square root of 679929861 is about 26075.4647321960. The cubic root of 679929861 is about 879.3356991532.

The spelling of 679929861 in words is "six hundred seventy-nine million, nine hundred twenty-nine thousand, eight hundred sixty-one".