686894 has 16 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 305760.

The previous prime is 686893. The next prime is 686897. The reversal of 686894 is 498686.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686891) 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, 299 + ... + 1209.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁶⁸⁶⁸⁹⁴ is an apocalyptic number.

686894 is a deficient number, since it is larger than the sum of its proper divisors (462226).

686894 is a wasteful number, since it uses less digits than its factorization.

686894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its digits is 82944, while the sum is 41.

The square root of 686894 is about 828.7906852758. The cubic root of 686894 is about 88.2327687469.

The spelling of 686894 in words is "six hundred eighty-six thousand, eight hundred ninety-four".