12443731 has 2 divisors, whose sum is σ = 12443732. Its totient is φ = 12443730.

The previous prime is 12443719. The next prime is 12443747. The reversal of 12443731 is 13734421.

It is a weak prime.

It is an emirp because it is prime and its reverse (13734421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12443731 - 2⁹ = 12443219 is a prime.

It is a super-2 number, since 2×12443731² = 309692882400722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12443696 and 12443705.

It is not a weakly prime, because it can be changed into another prime (12443701) 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, 6221865 + 6221866.

It is an arithmetic number, because the mean of its divisors is an integer number (6221866).

Almost surely, 2^12443731 is an apocalyptic number.

12443731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443731 is an equidigital number, since it uses as much as digits as its factorization.

12443731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 12443731 is about 3527.5672920584. The cubic root of 12443731 is about 231.7306810889.

The spelling of 12443731 in words is "twelve million, four hundred forty-three thousand, seven hundred thirty-one".