680963985 has 48 divisors (see below), whose sum is σ = 1345924944. Its totient is φ = 315518976.

The previous prime is 680963909. The next prime is 680963999. The reversal of 680963985 is 589369086.

680963985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 78163281 + 602800704 = 8841^2 + 24552^2 .

It is not a de Polignac number, because 680963985 - 2¹⁵ = 680931217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24292 + ... + 44181.

It is an arithmetic number, because the mean of its divisors is an integer number (28040103).

Almost surely, 2^680963985 is an apocalyptic number.

680963985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

680963985 is a deficient number, since it is larger than the sum of its proper divisors (664960959).

680963985 is a wasteful number, since it uses less digits than its factorization.

680963985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68514 (or 68511 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 680963985 is about 26095.2866433768. The cubic root of 680963985 is about 879.7812752718.

The spelling of 680963985 in words is "six hundred eighty million, nine hundred sixty-three thousand, nine hundred eighty-five".