12403309 has 2 divisors, whose sum is σ = 12403310. Its totient is φ = 12403308.

The previous prime is 12403301. The next prime is 12403351. The reversal of 12403309 is 90330421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 1447209 = 3310^2 + 1203^2 .

It is a cyclic number.

It is not a de Polignac number, because 12403309 - 2³ = 12403301 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 12403309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12403301) 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, 6201654 + 6201655.

It is an arithmetic number, because the mean of its divisors is an integer number (6201655).

Almost surely, 2^12403309 is an apocalyptic number.

It is an amenable number.

12403309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12403309 is an equidigital number, since it uses as much as digits as its factorization.

12403309 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12403309 is about 3521.8331874182. The cubic root of 12403309 is about 231.4794922644.

The spelling of 12403309 in words is "twelve million, four hundred three thousand, three hundred nine".