6855899 has 2 divisors, whose sum is σ = 6855900. Its totient is φ = 6855898.

The previous prime is 6855889. The next prime is 6855911. The reversal of 6855899 is 9985586.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6855899 - 2⁸ = 6855643 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6855809) 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, 3427949 + 3427950.

It is an arithmetic number, because the mean of its divisors is an integer number (3427950).

Almost surely, 2^6855899 is an apocalyptic number.

6855899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855899 is an equidigital number, since it uses as much as digits as its factorization.

6855899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The square root of 6855899 is about 2618.3771691641. The cubic root of 6855899 is about 189.9713622581.

The spelling of 6855899 in words is "six million, eight hundred fifty-five thousand, eight hundred ninety-nine".