6808689 has 12 divisors (see below), whose sum is σ = 9870276. Its totient is φ = 4522752.

The previous prime is 6808657. The next prime is 6808699. The reversal of 6808689 is 9868086.

It can be written as a sum of positive squares in 2 ways, for example, as 3122289 + 3686400 = 1767^2 + 1920^2 .

It is not a de Polignac number, because 6808689 - 2⁵ = 6808657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6808639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1609 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (822523).

Almost surely, 2^6808689 is an apocalyptic number.

It is an amenable number.

6808689 is a deficient number, since it is larger than the sum of its proper divisors (3061587).

6808689 is a wasteful number, since it uses less digits than its factorization.

6808689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2733 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 6808689 is about 2609.3464699039. The cubic root of 6808689 is about 189.5343073434.

The spelling of 6808689 in words is "six million, eight hundred eight thousand, six hundred eighty-nine".