686494 has 16 divisors (see below), whose sum is σ = 1111536. Its totient is φ = 316800.

The previous prime is 686479. The next prime is 686503. The reversal of 686494 is 494686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1909 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (69471).

2⁶⁸⁶⁴⁹⁴ is an apocalyptic number.

686494 is a deficient number, since it is larger than the sum of its proper divisors (425042).

686494 is a wasteful number, since it uses less digits than its factorization.

686494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411.

The product of its digits is 41472, while the sum is 37.

The square root of 686494 is about 828.5493346808. The cubic root of 686494 is about 88.2156385150.

The spelling of 686494 in words is "six hundred eighty-six thousand, four hundred ninety-four".