12309233 has 2 divisors, whose sum is σ = 12309234. Its totient is φ = 12309232.

The previous prime is 12309191. The next prime is 12309239. The reversal of 12309233 is 33290321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11641744 + 667489 = 3412^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 12309233 - 2¹⁴ = 12292849 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12309199 and 12309208.

It is not a weakly prime, because it can be changed into another prime (12309239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154616 + 6154617.

It is an arithmetic number, because the mean of its divisors is an integer number (6154617).

Almost surely, 2^12309233 is an apocalyptic number.

It is an amenable number.

12309233 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309233 is an equidigital number, since it uses as much as digits as its factorization.

12309233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 12309233 is about 3508.4516527950. The cubic root of 12309233 is about 230.8927683307.

Adding to 12309233 its reverse (33290321), we get a palindrome (45599554).

The spelling of 12309233 in words is "twelve million, three hundred nine thousand, two hundred thirty-three".