680968 has 8 divisors (see below), whose sum is σ = 1276830. Its totient is φ = 340480.

The previous prime is 680959. The next prime is 680971. The reversal of 680968 is 869086.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 248004 = 658^2 + 498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42553 + ... + 42568.

2⁶⁸⁰⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

680968 is a deficient number, since it is larger than the sum of its proper divisors (595862).

680968 is a wasteful number, since it uses less digits than its factorization.

680968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85127 (or 85123 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 680968 is about 825.2078526044. The cubic root of 680968 is about 87.9783004348.

The spelling of 680968 in words is "six hundred eighty thousand, nine hundred sixty-eight".