12023309 has 2 divisors, whose sum is σ = 12023310. Its totient is φ = 12023308.

The previous prime is 12023299. The next prime is 12023317. The reversal of 12023309 is 90332021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 1493284 = 3245^2 + 1222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12023309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12023329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011654 + 6011655.

It is an arithmetic number, because the mean of its divisors is an integer number (6011655).

Almost surely, 2^12023309 is an apocalyptic number.

It is an amenable number.

12023309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023309 is an equidigital number, since it uses as much as digits as its factorization.

12023309 is an evil number, because the sum of its binary digits is even.

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

The square root of 12023309 is about 3467.4643473293. The cubic root of 12023309 is about 229.0909867715.

The spelling of 12023309 in words is "twelve million, twenty-three thousand, three hundred nine".