12168389 has 2 divisors, whose sum is σ = 12168390. Its totient is φ = 12168388.

The previous prime is 12168367. The next prime is 12168391. The reversal of 12168389 is 98386121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10452289 + 1716100 = 3233^2 + 1310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12168389 is a prime.

It is a Sophie Germain prime.

Together with 12168391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12168319) 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, 6084194 + 6084195.

It is an arithmetic number, because the mean of its divisors is an integer number (6084195).

Almost surely, 2^12168389 is an apocalyptic number.

It is an amenable number.

12168389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12168389 is an equidigital number, since it uses as much as digits as its factorization.

12168389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 12168389 is about 3488.3218028158. The cubic root of 12168389 is about 230.0087520299.

The spelling of 12168389 in words is "twelve million, one hundred sixty-eight thousand, three hundred eighty-nine".