6809689 has 4 divisors (see below), whose sum is σ = 6954624. Its totient is φ = 6664756.

The previous prime is 6809687. The next prime is 6809701. The reversal of 6809689 is 9869086.

It is a happy number.

6809689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9869086 = 2 ⋅4934543.

It is a cyclic number.

It is not a de Polignac number, because 6809689 - 2¹ = 6809687 is a prime.

It is a super-3 number, since 3×6809689³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6809683) 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 3 ways as a sum of consecutive naturals, for example, 72397 + ... + 72490.

It is an arithmetic number, because the mean of its divisors is an integer number (1738656).

Almost surely, 2^6809689 is an apocalyptic number.

It is an amenable number.

6809689 is a deficient number, since it is larger than the sum of its proper divisors (144935).

6809689 is a wasteful number, since it uses less digits than its factorization.

6809689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144934.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 6809689 is about 2609.5380817302. The cubic root of 6809689 is about 189.5435859299.

The spelling of 6809689 in words is "six million, eight hundred nine thousand, six hundred eighty-nine".