679984861 has 8 divisors (see below), whose sum is σ = 699058944. Its totient is φ = 661102800.

The previous prime is 679984829. The next prime is 679984867. The reversal of 679984861 is 168489976.

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 679984861 - 2⁵ = 679984829 is a prime.

It is a super-2 number, since 2×679984861² = 924758822378378642, 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 = 679984796 and 679984805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679984867) 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, 40810 + ... + 55003.

It is an arithmetic number, because the mean of its divisors is an integer number (87382368).

Almost surely, 2^679984861 is an apocalyptic number.

It is an amenable number.

679984861 is a deficient number, since it is larger than the sum of its proper divisors (19074083).

679984861 is a wasteful number, since it uses less digits than its factorization.

679984861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96011.

The product of its digits is 5225472, while the sum is 58.

The square root of 679984861 is about 26076.5193421208. The cubic root of 679984861 is about 879.3594085396.

The spelling of 679984861 in words is "six hundred seventy-nine million, nine hundred eighty-four thousand, eight hundred sixty-one".