12443789 has 2 divisors, whose sum is σ = 12443790. Its totient is φ = 12443788.

The previous prime is 12443777. The next prime is 12443791. The reversal of 12443789 is 98734421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11526025 + 917764 = 3395^2 + 958^2 .

It is an emirp because it is prime and its reverse (98734421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12443789 - 2²⁰ = 11395213 is a prime.

Together with 12443791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12443719) 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, 6221894 + 6221895.

It is an arithmetic number, because the mean of its divisors is an integer number (6221895).

Almost surely, 2^12443789 is an apocalyptic number.

It is an amenable number.

12443789 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443789 is an equidigital number, since it uses as much as digits as its factorization.

12443789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 12443789 is about 3527.5755130117. The cubic root of 12443789 is about 231.7310411192.

The spelling of 12443789 in words is "twelve million, four hundred forty-three thousand, seven hundred eighty-nine".