680859 has 16 divisors (see below), whose sum is σ = 1021440. Its totient is φ = 448200.

The previous prime is 680857. The next prime is 680861. The reversal of 680859 is 958086.

It is an interprime number because it is at equal distance from previous prime (680857) and next prime (680861).

It is not a de Polignac number, because 680859 - 2¹ = 680857 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680859.

It is not an unprimeable number, because it can be changed into a prime (680857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3994 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2⁶⁸⁰⁸⁵⁹ is an apocalyptic number.

680859 is a deficient number, since it is larger than the sum of its proper divisors (340581).

680859 is a wasteful number, since it uses less digits than its factorization.

680859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 680859 is about 825.1418059946. The cubic root of 680859 is about 87.9736060651.

The spelling of 680859 in words is "six hundred eighty thousand, eight hundred fifty-nine".