687925 has 12 divisors (see below), whose sum is σ = 975136. Its totient is φ = 471600.

The previous prime is 687923. The next prime is 687931. The reversal of 687925 is 529786.

It is not a de Polignac number, because 687925 - 2¹ = 687923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1791 + ... + 2140.

2⁶⁸⁷⁹²⁵ is an apocalyptic number.

It is an amenable number.

687925 is a deficient number, since it is larger than the sum of its proper divisors (287211).

687925 is a wasteful number, since it uses less digits than its factorization.

687925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3943 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 687925 is about 829.4124426364. The cubic root of 687925 is about 88.2768912798.

The spelling of 687925 in words is "six hundred eighty-seven thousand, nine hundred twenty-five".