2199209 has 2 divisors, whose sum is σ = 2199210. Its totient is φ = 2199208.

The previous prime is 2199203. The next prime is 2199217. The reversal of 2199209 is 9029912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315609 + 883600 = 1147^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199209 - 2¹² = 2195113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2199203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099604 + 1099605.

It is an arithmetic number, because the mean of its divisors is an integer number (1099605).

2^2199209 is an apocalyptic number.

It is an amenable number.

2199209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199209 is an equidigital number, since it uses as much as digits as its factorization.

2199209 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 2199209 is about 1482.9730274014. The cubic root of 2199209 is about 130.0435554252.

The spelling of 2199209 in words is "two million, one hundred ninety-nine thousand, two hundred nine".