12203309 has 2 divisors, whose sum is σ = 12203310. Its totient is φ = 12203308.

The previous prime is 12203299. The next prime is 12203327. The reversal of 12203309 is 90330221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 162409 = 3470^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 12203309 - 2⁸ = 12203053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12205309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101654 + 6101655.

It is an arithmetic number, because the mean of its divisors is an integer number (6101655).

Almost surely, 2^12203309 is an apocalyptic number.

It is an amenable number.

12203309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12203309 is an equidigital number, since it uses as much as digits as its factorization.

12203309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 12203309 is about 3493.3234891719. The cubic root of 12203309 is about 230.2285629600.

The spelling of 12203309 in words is "twelve million, two hundred three thousand, three hundred nine".