680887 has 4 divisors (see below), whose sum is σ = 697536. Its totient is φ = 664240.

The previous prime is 680881. The next prime is 680917. The reversal of 680887 is 788086.

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 680887 - 2³ = 680879 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680881) 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, 8263 + ... + 8344.

It is an arithmetic number, because the mean of its divisors is an integer number (174384).

2⁶⁸⁰⁸⁸⁷ is an apocalyptic number.

680887 is a deficient number, since it is larger than the sum of its proper divisors (16649).

680887 is a wasteful number, since it uses less digits than its factorization.

680887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 680887 is about 825.1587726008. The cubic root of 680887 is about 87.9748120061.

The spelling of 680887 in words is "six hundred eighty thousand, eight hundred eighty-seven".