680895 has 12 divisors (see below), whose sum is σ = 1180296. Its totient is φ = 363120.

The previous prime is 680881. The next prime is 680917. The reversal of 680895 is 598086.

It is not a de Polignac number, because 680895 - 2⁴ = 680879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7521 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (98358).

2⁶⁸⁰⁸⁹⁵ is an apocalyptic number.

680895 is a deficient number, since it is larger than the sum of its proper divisors (499401).

680895 is a wasteful number, since it uses less digits than its factorization.

680895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15142 (or 15139 counting only the distinct ones).

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

The square root of 680895 is about 825.1636201385. The cubic root of 680895 is about 87.9751565546.

It can be divided in two parts, 6808 and 95, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 680895 in words is "six hundred eighty thousand, eight hundred ninety-five".