6812891 has 2 divisors, whose sum is σ = 6812892. Its totient is φ = 6812890.

The previous prime is 6812879. The next prime is 6812909. The reversal of 6812891 is 1982186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6812891 - 2¹⁰ = 6811867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (6812821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3406445 + 3406446.

It is an arithmetic number, because the mean of its divisors is an integer number (3406446).

Almost surely, 2^6812891 is an apocalyptic number.

6812891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6812891 is an equidigital number, since it uses as much as digits as its factorization.

6812891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 6812891 is about 2610.1515281684. The cubic root of 6812891 is about 189.5732898542.

The spelling of 6812891 in words is "six million, eight hundred twelve thousand, eight hundred ninety-one".