686795 has 4 divisors (see below), whose sum is σ = 824160. Its totient is φ = 549432.

The previous prime is 686789. The next prime is 686797. The reversal of 686795 is 597686.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 686795 - 2⁶ = 686731 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686797) 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, 68675 + ... + 68684.

It is an arithmetic number, because the mean of its divisors is an integer number (206040).

2⁶⁸⁶⁷⁹⁵ is an apocalyptic number.

686795 is a deficient number, since it is larger than the sum of its proper divisors (137365).

686795 is a wasteful number, since it uses less digits than its factorization.

686795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137364.

The product of its digits is 90720, while the sum is 41.

The square root of 686795 is about 828.7309575490. The cubic root of 686795 is about 88.2285296339.

The spelling of 686795 in words is "six hundred eighty-six thousand, seven hundred ninety-five".