687676 has 12 divisors (see below), whose sum is σ = 1312920. Its totient is φ = 312560.

The previous prime is 687647. The next prime is 687679. The reversal of 687676 is 676786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687679) 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, 7771 + ... + 7858.

It is an arithmetic number, because the mean of its divisors is an integer number (109410).

2⁶⁸⁷⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

687676 is a deficient number, since it is larger than the sum of its proper divisors (625244).

687676 is a wasteful number, since it uses less digits than its factorization.

687676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15644 (or 15642 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 687676 is about 829.2623227906. The cubic root of 687676 is about 88.2662391503.

It can be divided in two parts, 68 and 7676, that added together give a square (7744 = 88²).

The spelling of 687676 in words is "six hundred eighty-seven thousand, six hundred seventy-six".