6806813 has 6 divisors (see below), whose sum is σ = 7370874. Its totient is φ = 6283056.

The previous prime is 6806803. The next prime is 6806831. The reversal of 6806813 is 3186086.

It can be written as a sum of positive squares in 3 ways, for example, as 466489 + 6340324 = 683^2 + 2518^2 .

It is not a de Polignac number, because 6806813 - 2⁴ = 6806797 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6806813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6806803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19970 + ... + 20307.

It is an arithmetic number, because the mean of its divisors is an integer number (1228479).

Almost surely, 2^6806813 is an apocalyptic number.

It is an amenable number.

6806813 is a deficient number, since it is larger than the sum of its proper divisors (564061).

6806813 is a wasteful number, since it uses less digits than its factorization.

6806813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40303 (or 40290 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 6806813 is about 2608.9869681545. The cubic root of 6806813 is about 189.5168982640.

The spelling of 6806813 in words is "six million, eight hundred six thousand, eight hundred thirteen".