12443219 has 2 divisors, whose sum is σ = 12443220. Its totient is φ = 12443218.

The previous prime is 12443191. The next prime is 12443231. The reversal of 12443219 is 91234421.

It is a strong prime.

It is an emirp because it is prime and its reverse (91234421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12443219 - 2¹² = 12439123 is a prime.

It is a super-2 number, since 2×12443219² = 309667398163922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12443719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221609 + 6221610.

It is an arithmetic number, because the mean of its divisors is an integer number (6221610).

Almost surely, 2^12443219 is an apocalyptic number.

12443219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443219 is an equidigital number, since it uses as much as digits as its factorization.

12443219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 12443219 is about 3527.4947200527. The cubic root of 12443219 is about 231.7275028424.

The spelling of 12443219 in words is "twelve million, four hundred forty-three thousand, two hundred nineteen".