680789 has 4 divisors (see below), whose sum is σ = 716640. Its totient is φ = 644940.

The previous prime is 680783. The next prime is 680803. The reversal of 680789 is 987086.

680789 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680789 - 2¹⁶ = 615253 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 (680783) 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, 17897 + ... + 17934.

It is an arithmetic number, because the mean of its divisors is an integer number (179160).

2⁶⁸⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

680789 is a deficient number, since it is larger than the sum of its proper divisors (35851).

680789 is a wasteful number, since it uses less digits than its factorization.

680789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35850.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 680789 is about 825.0993879527. The cubic root of 680789 is about 87.9705910682.

The spelling of 680789 in words is "six hundred eighty thousand, seven hundred eighty-nine".