687916 has 12 divisors (see below), whose sum is σ = 1210720. Its totient is φ = 342000.

The previous prime is 687901. The next prime is 687917. The reversal of 687916 is 619786.

It is not an unprimeable number, because it can be changed into a prime (687917) 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, 541 + ... + 1291.

2⁶⁸⁷⁹¹⁶ is an apocalyptic number.

It is an amenable number.

687916 is a deficient number, since it is larger than the sum of its proper divisors (522804).

687916 is a wasteful number, since it uses less digits than its factorization.

687916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 982 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 687916 is about 829.4070170911. The cubic root of 687916 is about 88.2765063079.

The spelling of 687916 in words is "six hundred eighty-seven thousand, nine hundred sixteen".