12208109 has 8 divisors (see below), whose sum is σ = 12587520. Its totient is φ = 11833776.

The previous prime is 12208099. The next prime is 12208111. The reversal of 12208109 is 90180221.

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

It is a cyclic number.

It is not a de Polignac number, because 12208109 - 2⁴ = 12208093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12208169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3932 + ... + 6314.

It is an arithmetic number, because the mean of its divisors is an integer number (1573440).

Almost surely, 2^12208109 is an apocalyptic number.

It is an amenable number.

12208109 is a deficient number, since it is larger than the sum of its proper divisors (379411).

12208109 is a wasteful number, since it uses less digits than its factorization.

12208109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 12208109 is about 3494.0104464641. The cubic root of 12208109 is about 230.2587447258.

The spelling of 12208109 in words is "twelve million, two hundred eight thousand, one hundred nine".