6839 has 4 divisors (see below), whose sum is σ = 7824. Its totient is φ = 5856.

The previous prime is 6833. The next prime is 6841. The reversal of 6839 is 9386.

6839 = T₂₄ + T₂₅ + ... + T₃₇.

6839 = 7² + 8² + ... + 27².

It is a happy number.

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 6839 - 2⁴ = 6823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6833) 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, 482 + ... + 495.

It is an arithmetic number, because the mean of its divisors is an integer number (1956).

2⁶⁸³⁹ is an apocalyptic number.

6839 is a deficient number, since it is larger than the sum of its proper divisors (985).

6839 is an equidigital number, since it uses as much as digits as its factorization.

6839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its digits is 1296, while the sum is 26.

The square root of 6839 is about 82.6982466561. The cubic root of 6839 is about 18.9815148008.

The spelling of 6839 in words is "six thousand, eight hundred thirty-nine".