8109909 has 8 divisors (see below), whose sum is σ = 12014720. Its totient is φ = 5406588.

The previous prime is 8109887. The next prime is 8109917. The reversal of 8109909 is 9099018.

It is not a de Polignac number, because 8109909 - 2⁹ = 8109397 is a prime.

It is a Duffinian number.

8109909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109109) 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 7 ways as a sum of consecutive naturals, for example, 150157 + ... + 150210.

It is an arithmetic number, because the mean of its divisors is an integer number (1501840).

Almost surely, 2^8109909 is an apocalyptic number.

It is an amenable number.

8109909 is a deficient number, since it is larger than the sum of its proper divisors (3904811).

8109909 is a wasteful number, since it uses less digits than its factorization.

8109909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300376 (or 300370 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 8109909 is about 2847.7901959239. The cubic root of 8109909 is about 200.9117456170.

The spelling of 8109909 in words is "eight million, one hundred nine thousand, nine hundred nine".