686968 has 16 divisors (see below), whose sum is σ = 1318680. Its totient is φ = 335328.

The previous prime is 686963. The next prime is 686969. The reversal of 686968 is 869686.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686963) 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, 655 + ... + 1342.

2⁶⁸⁶⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

686968 is a deficient number, since it is larger than the sum of its proper divisors (631712).

686968 is a wasteful number, since it uses less digits than its factorization.

686968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046 (or 2042 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 686968 is about 828.8353274324. The cubic root of 686968 is about 88.2359371108.

The spelling of 686968 in words is "six hundred eighty-six thousand, nine hundred sixty-eight".