686983 has 12 divisors (see below), whose sum is σ = 795528. Its totient is φ = 588240.

The previous prime is 686977. The next prime is 686989. The reversal of 686983 is 389686.

It is an interprime number because it is at equal distance from previous prime (686977) and next prime (686989).

It is a de Polignac number, because none of the positive numbers 2^k-686983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3885 + ... + 4057.

It is an arithmetic number, because the mean of its divisors is an integer number (66294).

2⁶⁸⁶⁹⁸³ is an apocalyptic number.

686983 is a deficient number, since it is larger than the sum of its proper divisors (108545).

686983 is a wasteful number, since it uses less digits than its factorization.

686983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 203 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 686983 is about 828.8443762251. The cubic root of 686983 is about 88.2365793190.

The spelling of 686983 in words is "six hundred eighty-six thousand, nine hundred eighty-three".