12369809 has 2 divisors, whose sum is σ = 12369810. Its totient is φ = 12369808.

The previous prime is 12369787. The next prime is 12369821. The reversal of 12369809 is 90896321.

12369809 is digitally balanced in base 3, 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., 8179600 + 4190209 = 2860^2 + 2047^2 .

It is an emirp because it is prime and its reverse (90896321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12369809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12369839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6184904 + 6184905.

It is an arithmetic number, because the mean of its divisors is an integer number (6184905).

Almost surely, 2^12369809 is an apocalyptic number.

It is an amenable number.

12369809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12369809 is an equidigital number, since it uses as much as digits as its factorization.

12369809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 12369809 is about 3517.0739258651. The cubic root of 12369809 is about 231.2709039783.

The spelling of 12369809 in words is "twelve million, three hundred sixty-nine thousand, eight hundred nine".