687694 has 8 divisors (see below), whose sum is σ = 1178928. Its totient is φ = 294720.

The previous prime is 687691. The next prime is 687707. The reversal of 687694 is 496786.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687691) 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, 24547 + ... + 24574.

It is an arithmetic number, because the mean of its divisors is an integer number (147366).

2⁶⁸⁷⁶⁹⁴ is an apocalyptic number.

687694 is a deficient number, since it is larger than the sum of its proper divisors (491234).

687694 is a wasteful number, since it uses less digits than its factorization.

687694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49130.

The product of its digits is 72576, while the sum is 40.

The square root of 687694 is about 829.2731757389. The cubic root of 687694 is about 88.2670092700.

The spelling of 687694 in words is "six hundred eighty-seven thousand, six hundred ninety-four".