680839 has 4 divisors (see below), whose sum is σ = 683640. Its totient is φ = 678040.

The previous prime is 680831. The next prime is 680857. The reversal of 680839 is 938086.

680839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 680839 - 2³ = 680831 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 (680831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (170910).

2⁶⁸⁰⁸³⁹ is an apocalyptic number.

680839 is a deficient number, since it is larger than the sum of its proper divisors (2801).

680839 is a wasteful number, since it uses less digits than its factorization.

680839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 680839 is about 825.1296867766. The cubic root of 680839 is about 87.9727446585.

The spelling of 680839 in words is "six hundred eighty thousand, eight hundred thirty-nine".