687934 has 8 divisors (see below), whose sum is σ = 1111320. Its totient is φ = 317496.

The previous prime is 687931. The next prime is 687949. The reversal of 687934 is 439786.

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

It is a junction number, because it is equal to n+sod(n) for n = 687893 and 687902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687931) 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, 13204 + ... + 13255.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2⁶⁸⁷⁹³⁴ is an apocalyptic number.

687934 is a deficient number, since it is larger than the sum of its proper divisors (423386).

687934 is a wasteful number, since it uses less digits than its factorization.

687934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26474.

The product of its digits is 36288, while the sum is 37.

The square root of 687934 is about 829.4178681461. The cubic root of 687934 is about 88.2772762484.

The spelling of 687934 in words is "six hundred eighty-seven thousand, nine hundred thirty-four".