6855791 has 4 divisors (see below), whose sum is σ = 7015272. Its totient is φ = 6696312.

The previous prime is 6855787. The next prime is 6855799. The reversal of 6855791 is 1975586.

6855791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1975586 = 2 ⋅987793.

It is a cyclic number.

It is not a de Polignac number, because 6855791 - 2² = 6855787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79676 + ... + 79761.

It is an arithmetic number, because the mean of its divisors is an integer number (1753818).

Almost surely, 2^6855791 is an apocalyptic number.

6855791 is a deficient number, since it is larger than the sum of its proper divisors (159481).

6855791 is a wasteful number, since it uses less digits than its factorization.

6855791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159480.

The product of its digits is 75600, while the sum is 41.

The square root of 6855791 is about 2618.3565456217. The cubic root of 6855791 is about 189.9703647223.

The spelling of 6855791 in words is "six million, eight hundred fifty-five thousand, seven hundred ninety-one".