6813

6813 is an integer that lies between 6812 and 6814. In mathematics, it is a composite number with prime factorization 3^2 × 757, meaning it is divisible by 3 and by 9, but not by 27. Its positive divisors are 1, 3, 9, 757, 2271, and 6813. The sum of its digits is 18, giving a digital root of 9. It is an odd number and not a perfect square.

As a four-digit natural number, 6813 can appear in various numerical contexts, such as identifiers, catalog entries, or part numbers in inventories and datasets. Without accompanying context, it does not designate a single widely recognized object, organization, or standard.

In number theory, 6813 serves as an example of a number that is divisible by 9 but not by 27, since 6813 = 9 × 757 and 757 is prime. Its factorization also demonstrates how a composite number can have a relatively small repeated prime factor alongside a larger prime factor. Beyond these mathematical properties, 6813’s significance depends on the specific real-world system in which the number is used.