6823391 has 2 divisors, whose sum is σ = 6823392. Its totient is φ = 6823390.

The previous prime is 6823373. The next prime is 6823423. The reversal of 6823391 is 1933286.

It is an a-pointer prime, because the next prime (6823423) can be obtained adding 6823391 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6823391 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6823351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3411695 + 3411696.

It is an arithmetic number, because the mean of its divisors is an integer number (3411696).

Almost surely, 2^6823391 is an apocalyptic number.

6823391 is a deficient number, since it is larger than the sum of its proper divisors (1).

6823391 is an equidigital number, since it uses as much as digits as its factorization.

6823391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 6823391 is about 2612.1621312621. The cubic root of 6823391 is about 189.6706297268.

The spelling of 6823391 in words is "six million, eight hundred twenty-three thousand, three hundred ninety-one".