6811439 has 2 divisors, whose sum is σ = 6811440. Its totient is φ = 6811438.

The previous prime is 6811423. The next prime is 6811451. The reversal of 6811439 is 9341186.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6811439 - 2⁴ = 6811423 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6811489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405719 + 3405720.

It is an arithmetic number, because the mean of its divisors is an integer number (3405720).

Almost surely, 2^6811439 is an apocalyptic number.

6811439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6811439 is an equidigital number, since it uses as much as digits as its factorization.

6811439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 6811439 is about 2609.8733685756. The cubic root of 6811439 is about 189.5598212707.

The spelling of 6811439 in words is "six million, eight hundred eleven thousand, four hundred thirty-nine".