680912 has 10 divisors (see below), whose sum is σ = 1319298. Its totient is φ = 340448.

The previous prime is 680881. The next prime is 680917. The reversal of 680912 is 219086.

It can be written as a sum of positive squares in only one way, i.e., 678976 + 1936 = 824^2 + 44^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680912.

It is not an unprimeable number, because it can be changed into a prime (680917) by changing a digit.

680912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21263 + ... + 21294.

2⁶⁸⁰⁹¹² is an apocalyptic number.

It is an amenable number.

680912 is a deficient number, since it is larger than the sum of its proper divisors (638386).

680912 is a wasteful number, since it uses less digits than its factorization.

680912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42565 (or 42559 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 680912 is about 825.1739210615. The cubic root of 680912 is about 87.9758887111.

Adding to 680912 its reverse (219086), we get a palindrome (899998).

The spelling of 680912 in words is "six hundred eighty thousand, nine hundred twelve".