686876 has 6 divisors (see below), whose sum is σ = 1202040. Its totient is φ = 343436.

The previous prime is 686863. The next prime is 686879. The reversal of 686876 is 678686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686879) 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 as a sum of consecutive naturals, namely, 85856 + ... + 85863.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

2⁶⁸⁶⁸⁷⁶ is an apocalyptic number.

It is an amenable number.

686876 is a deficient number, since it is larger than the sum of its proper divisors (515164).

686876 is a wasteful number, since it uses less digits than its factorization.

686876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171723 (or 171721 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 686876 is about 828.7798260093. The cubic root of 686876 is about 88.2319980294.

The spelling of 686876 in words is "six hundred eighty-six thousand, eight hundred seventy-six".