687907 has 8 divisors (see below), whose sum is σ = 783360. Its totient is φ = 597960.

The previous prime is 687901. The next prime is 687917. The reversal of 687907 is 709786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 687907 - 2⁷ = 687779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁶⁸⁷⁹⁰⁷ is an apocalyptic number.

687907 is a deficient number, since it is larger than the sum of its proper divisors (95453).

687907 is a wasteful number, since it uses less digits than its factorization.

687907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 687907 is about 829.4015915104. The cubic root of 687907 is about 88.2761213326.

The spelling of 687907 in words is "six hundred eighty-seven thousand, nine hundred seven".