6855887 has 2 divisors, whose sum is σ = 6855888. Its totient is φ = 6855886.

The previous prime is 6855869. The next prime is 6855889. The reversal of 6855887 is 7885586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6855887 - 2⁸ = 6855631 is a prime.

Together with 6855889, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6855889) 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 as a sum of consecutive naturals, namely, 3427943 + 3427944.

It is an arithmetic number, because the mean of its divisors is an integer number (3427944).

Almost surely, 2^6855887 is an apocalyptic number.

6855887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855887 is an equidigital number, since it uses as much as digits as its factorization.

6855887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 537600, while the sum is 47.

The square root of 6855887 is about 2618.3748776674. The cubic root of 6855887 is about 189.9712514213.

It can be divided in two parts, 68 and 55887, that added together give a palindrome (55955).

The spelling of 6855887 in words is "six million, eight hundred fifty-five thousand, eight hundred eighty-seven".