6816839 has 8 divisors (see below), whose sum is σ = 7200000. Its totient is φ = 6436152.

The previous prime is 6816829. The next prime is 6816841. The reversal of 6816839 is 9386186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6816839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6816796 and 6816805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6816829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9122 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (900000).

Almost surely, 2^6816839 is an apocalyptic number.

6816839 is a deficient number, since it is larger than the sum of its proper divisors (383161).

6816839 is a wasteful number, since it uses less digits than its factorization.

6816839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its digits is 62208, while the sum is 41.

The square root of 6816839 is about 2610.9076965684. The cubic root of 6816839 is about 189.6099013713.

The spelling of 6816839 in words is "six million, eight hundred sixteen thousand, eight hundred thirty-nine".