6810813 has 12 divisors (see below), whose sum is σ = 10067200. Its totient is φ = 4434696.

The previous prime is 6810809. The next prime is 6810841. The reversal of 6810813 is 3180186.

It is not a de Polignac number, because 6810813 - 2² = 6810809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6810803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8413 + ... + 9186.

Almost surely, 2^6810813 is an apocalyptic number.

It is an amenable number.

6810813 is a deficient number, since it is larger than the sum of its proper divisors (3256387).

6810813 is a wasteful number, since it uses less digits than its factorization.

6810813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17648 (or 17645 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 6810813 is about 2609.7534366296. The cubic root of 6810813 is about 189.5540139769.

Adding to 6810813 its reverse (3180186), we get a palindrome (9990999).

It can be divided in two parts, 68108 and 13, that added together give a square (68121 = 261²).

The spelling of 6810813 in words is "six million, eight hundred ten thousand, eight hundred thirteen".