687950 has 12 divisors (see below), whose sum is σ = 1279680. Its totient is φ = 275160.

The previous prime is 687949. The next prime is 687961. The reversal of 687950 is 59786.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 687950.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6830 + ... + 6929.

It is an arithmetic number, because the mean of its divisors is an integer number (106640).

2⁶⁸⁷⁹⁵⁰ is an apocalyptic number.

687950 is a deficient number, since it is larger than the sum of its proper divisors (591730).

687950 is a wasteful number, since it uses less digits than its factorization.

687950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13771 (or 13766 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 687950 is about 829.4275134091. The cubic root of 687950 is about 88.2779606287.

The spelling of 687950 in words is "six hundred eighty-seven thousand, nine hundred fifty".