6805813 has 4 divisors (see below), whose sum is σ = 7778080. Its totient is φ = 5833548.

The previous prime is 6805789. The next prime is 6805829. The reversal of 6805813 is 3185086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-6805813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6805853) 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, 486123 + ... + 486136.

It is an arithmetic number, because the mean of its divisors is an integer number (1944520).

Almost surely, 2^6805813 is an apocalyptic number.

It is an amenable number.

6805813 is a deficient number, since it is larger than the sum of its proper divisors (972267).

6805813 is an equidigital number, since it uses as much as digits as its factorization.

6805813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972266.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 6805813 is about 2608.7953158498. The cubic root of 6805813 is about 189.5076170640.

The spelling of 6805813 in words is "six million, eight hundred five thousand, eight hundred thirteen".