12340309 has 2 divisors, whose sum is σ = 12340310. Its totient is φ = 12340308.

The previous prime is 12340271. The next prime is 12340313. The reversal of 12340309 is 90304321.

12340309 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., 12006225 + 334084 = 3465^2 + 578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12340309 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12340309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340409) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170154 + 6170155.

It is an arithmetic number, because the mean of its divisors is an integer number (6170155).

Almost surely, 2^12340309 is an apocalyptic number.

It is an amenable number.

12340309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340309 is an equidigital number, since it uses as much as digits as its factorization.

12340309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 12340309 is about 3512.8775953625. The cubic root of 12340309 is about 231.0869096963.

The spelling of 12340309 in words is "twelve million, three hundred forty thousand, three hundred nine".