12208091 has 16 divisors (see below), whose sum is σ = 14883264. Its totient is φ = 9775104.

The previous prime is 12208081. The next prime is 12208093. The reversal of 12208091 is 19080221.

It is a cyclic number.

It is not a de Polignac number, because 12208091 - 2¹⁰ = 12207067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12208093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20291 + ... + 20883.

It is an arithmetic number, because the mean of its divisors is an integer number (930204).

Almost surely, 2^12208091 is an apocalyptic number.

12208091 is a deficient number, since it is larger than the sum of its proper divisors (2675173).

12208091 is a wasteful number, since it uses less digits than its factorization.

12208091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790.

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

The square root of 12208091 is about 3494.0078706265. The cubic root of 12208091 is about 230.2586315589.

The spelling of 12208091 in words is "twelve million, two hundred eight thousand, ninety-one".