683779979 has 8 divisors (see below), whose sum is σ = 692726160. Its totient is φ = 674850816.

The previous prime is 683779931. The next prime is 683779981. The reversal of 683779979 is 979977386.

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 683779979 - 2²⁰ = 682731403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (683779909) 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, 90059 + ... + 97355.

It is an arithmetic number, because the mean of its divisors is an integer number (86590770).

Almost surely, 2^683779979 is an apocalyptic number.

683779979 is a deficient number, since it is larger than the sum of its proper divisors (8946181).

683779979 is a wasteful number, since it uses less digits than its factorization.

683779979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509.

The product of its digits is 36006768, while the sum is 65.

The square root of 683779979 is about 26149.1869663284. The cubic root of 683779979 is about 880.9923288443.

The spelling of 683779979 in words is "six hundred eighty-three million, seven hundred seventy-nine thousand, nine hundred seventy-nine".