8109409 has 32 divisors (see below), whose sum is σ = 11151360. Its totient is φ = 5702400.

The previous prime is 8109397. The next prime is 8109419. The reversal of 8109409 is 9049018.

It is not a de Polignac number, because 8109409 - 2¹¹ = 8107361 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33529 + ... + 33769.

It is an arithmetic number, because the mean of its divisors is an integer number (348480).

Almost surely, 2^8109409 is an apocalyptic number.

It is an amenable number.

8109409 is a deficient number, since it is larger than the sum of its proper divisors (3041951).

8109409 is a wasteful number, since it uses less digits than its factorization.

8109409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8109409 is about 2847.7024072048. The cubic root of 8109409 is about 200.9076165967.

The spelling of 8109409 in words is "eight million, one hundred nine thousand, four hundred nine".