680939 has 8 divisors (see below), whose sum is σ = 787680. Its totient is φ = 576576.

The previous prime is 680929. The next prime is 680959. The reversal of 680939 is 939086.

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

It is not a de Polignac number, because 680939 - 2¹⁶ = 615403 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 680899 and 680908.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680939.

It is not an unprimeable number, because it can be changed into a prime (680929) 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, 77 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (98460).

2⁶⁸⁰⁹³⁹ is an apocalyptic number.

680939 is a deficient number, since it is larger than the sum of its proper divisors (106741).

680939 is a wasteful number, since it uses less digits than its factorization.

680939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 680939 is about 825.1902810867. The cubic root of 680939 is about 87.9770515229.

The spelling of 680939 in words is "six hundred eighty thousand, nine hundred thirty-nine".