12443149 has 2 divisors, whose sum is σ = 12443150. Its totient is φ = 12443148.

The previous prime is 12443147. The next prime is 12443153. The reversal of 12443149 is 94134421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6538249 + 5904900 = 2557^2 + 2430^2 .

It is an emirp because it is prime and its reverse (94134421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12443149 - 2¹ = 12443147 is a prime.

Together with 12443147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12443147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221574 + 6221575.

It is an arithmetic number, because the mean of its divisors is an integer number (6221575).

Almost surely, 2^12443149 is an apocalyptic number.

It is an amenable number.

12443149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443149 is an equidigital number, since it uses as much as digits as its factorization.

12443149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 12443149 is about 3527.4847979828. The cubic root of 12443149 is about 231.7270683097.

The spelling of 12443149 in words is "twelve million, four hundred forty-three thousand, one hundred forty-nine".