6809839 has 4 divisors (see below), whose sum is σ = 6925320. Its totient is φ = 6694360.

The previous prime is 6809837. The next prime is 6809849. The reversal of 6809839 is 9389086.

6809839 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.

It is a cyclic number.

It is not a de Polignac number, because 6809839 - 2¹ = 6809837 is a prime.

It is a Duffinian number.

6809839 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6809795 and 6809804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6809833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57652 + ... + 57769.

It is an arithmetic number, because the mean of its divisors is an integer number (1731330).

Almost surely, 2^6809839 is an apocalyptic number.

6809839 is a deficient number, since it is larger than the sum of its proper divisors (115481).

6809839 is a wasteful number, since it uses less digits than its factorization.

6809839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115480.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 6809839 is about 2609.5668222906. The cubic root of 6809839 is about 189.5449776395.

The spelling of 6809839 in words is "six million, eight hundred nine thousand, eight hundred thirty-nine".