6806391 has 16 divisors (see below), whose sum is σ = 9446400. Its totient is φ = 4354560.

The previous prime is 6806383. The next prime is 6806407. The reversal of 6806391 is 1936086.

It is not a de Polignac number, because 6806391 - 2³ = 6806383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6806381) 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 in 15 ways as a sum of consecutive naturals, for example, 14935 + ... + 15383.

It is an arithmetic number, because the mean of its divisors is an integer number (590400).

Almost surely, 2^6806391 is an apocalyptic number.

6806391 is a deficient number, since it is larger than the sum of its proper divisors (2640009).

6806391 is a wasteful number, since it uses less digits than its factorization.

6806391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6806391 is about 2608.9060925990. The cubic root of 6806391 is about 189.5129817085.

The spelling of 6806391 in words is "six million, eight hundred six thousand, three hundred ninety-one".