680969 has 8 divisors (see below), whose sum is σ = 739368. Its totient is φ = 624640.

The previous prime is 680959. The next prime is 680971. The reversal of 680969 is 969086.

It can be written as a sum of positive squares in 4 ways, for example, as 169744 + 511225 = 412^2 + 715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680969 is a prime.

It is a super-2 number, since 2×680969² = 927437557922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209 + ... + 1185.

It is an arithmetic number, because the mean of its divisors is an integer number (92421).

2⁶⁸⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

680969 is a deficient number, since it is larger than the sum of its proper divisors (58399).

680969 is a wasteful number, since it uses less digits than its factorization.

680969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 680969 is about 825.2084585122. The cubic root of 680969 is about 87.9783435000.

The spelling of 680969 in words is "six hundred eighty thousand, nine hundred sixty-nine".