6855109 has 4 divisors (see below), whose sum is σ = 6879616. Its totient is φ = 6830604.

The previous prime is 6855089. The next prime is 6855113. The reversal of 6855109 is 9015586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6855109 - 2¹⁷ = 6724037 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 (6855139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11829 + ... + 12394.

It is an arithmetic number, because the mean of its divisors is an integer number (1719904).

Almost surely, 2^6855109 is an apocalyptic number.

It is an amenable number.

6855109 is a deficient number, since it is larger than the sum of its proper divisors (24507).

6855109 is a wasteful number, since it uses less digits than its factorization.

6855109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24506.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 6855109 is about 2618.2263080185. The cubic root of 6855109 is about 189.9640652262.

The spelling of 6855109 in words is "six million, eight hundred fifty-five thousand, one hundred nine".