680941979 has 8 divisors (see below), whose sum is σ = 713256192. Its totient is φ = 648853480.

The previous prime is 680941973. The next prime is 680941997. The reversal of 680941979 is 979149086.

It is a happy number.

680941979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680941979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680941979.

It is not an unprimeable number, because it can be changed into a prime (680941973) 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, 50237 + ... + 62334.

It is an arithmetic number, because the mean of its divisors is an integer number (89157024).

Almost surely, 2^680941979 is an apocalyptic number.

680941979 is a deficient number, since it is larger than the sum of its proper divisors (32314213).

680941979 is a wasteful number, since it uses less digits than its factorization.

680941979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112857.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 680941979 is about 26094.8649929445. The cubic root of 680941979 is about 879.7717981797.

The spelling of 680941979 in words is "six hundred eighty million, nine hundred forty-one thousand, nine hundred seventy-nine".