6847 has 4 divisors (see below), whose sum is σ = 7056. Its totient is φ = 6640.

The previous prime is 6841. The next prime is 6857. The reversal of 6847 is 7486.

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 6847 - 2⁷ = 6719 is a prime.

It is a Duffinian number.

It is a plaindrome in base 4 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6841) 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, 43 + ... + 124.

It is an arithmetic number, because the mean of its divisors is an integer number (1764).

2⁶⁸⁴⁷ is an apocalyptic number.

6847 is a deficient number, since it is larger than the sum of its proper divisors (209).

6847 is a wasteful number, since it uses less digits than its factorization.

6847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208.

The product of its digits is 1344, while the sum is 25.

The square root of 6847 is about 82.7466011387. The cubic root of 6847 is about 18.9889131995.

The spelling of 6847 in words is "six thousand, eight hundred forty-seven".