686794 has 8 divisors (see below), whose sum is σ = 1058148. Its totient is φ = 334080.

The previous prime is 686789. The next prime is 686797. The reversal of 686794 is 497686.

It can be written as a sum of positive squares in 2 ways, for example, as 555025 + 131769 = 745^2 + 363^2 .

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (686797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4567 + ... + 4714.

2⁶⁸⁶⁷⁹⁴ is an apocalyptic number.

686794 is a deficient number, since it is larger than the sum of its proper divisors (371354).

686794 is a wasteful number, since it uses less digits than its factorization.

686794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9320.

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

The square root of 686794 is about 828.7303542166. The cubic root of 686794 is about 88.2284868125.

The spelling of 686794 in words is "six hundred eighty-six thousand, seven hundred ninety-four".