12109409 has 8 divisors (see below), whose sum is σ = 13319040. Its totient is φ = 10939536.

The previous prime is 12109381. The next prime is 12109411. The reversal of 12109409 is 90490121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12109409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12109469) 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 7 ways as a sum of consecutive naturals, for example, 9299 + ... + 10520.

It is an arithmetic number, because the mean of its divisors is an integer number (1664880).

Almost surely, 2^12109409 is an apocalyptic number.

It is an amenable number.

12109409 is a deficient number, since it is larger than the sum of its proper divisors (1209631).

12109409 is a wasteful number, since it uses less digits than its factorization.

12109409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19879.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12109409 is about 3479.8576120295. The cubic root of 12109409 is about 229.6365336714.

The spelling of 12109409 in words is "twelve million, one hundred nine thousand, four hundred nine".