12099209 has 2 divisors, whose sum is σ = 12099210. Its totient is φ = 12099208.

The previous prime is 12099161. The next prime is 12099221. The reversal of 12099209 is 90299021.

12099209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10725625 + 1373584 = 3275^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 12099209 - 2¹² = 12095113 is a prime.

It is not a weakly prime, because it can be changed into another prime (12099229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6049604 + 6049605.

It is an arithmetic number, because the mean of its divisors is an integer number (6049605).

Almost surely, 2^12099209 is an apocalyptic number.

It is an amenable number.

12099209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12099209 is an equidigital number, since it uses as much as digits as its factorization.

12099209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 12099209 is about 3478.3917260711. The cubic root of 12099209 is about 229.5720397283.

The spelling of 12099209 in words is "twelve million, ninety-nine thousand, two hundred nine".