12447432749 has 2 divisors, whose sum is σ = 12447432750. Its totient is φ = 12447432748.

The previous prime is 12447432731. The next prime is 12447432757. The reversal of 12447432749 is 94723474421.

12447432749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9185880649 + 3261552100 = 95843^2 + 57110^2 .

It is a cyclic number.

It is not a de Polignac number, because 12447432749 - 2¹⁶ = 12447367213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12447432709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223716374 + 6223716375.

It is an arithmetic number, because the mean of its divisors is an integer number (6223716375).

Almost surely, 2^12447432749 is an apocalyptic number.

It is an amenable number.

12447432749 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447432749 is an equidigital number, since it uses as much as digits as its factorization.

12447432749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 47.

The spelling of 12447432749 in words is "twelve billion, four hundred forty-seven million, four hundred thirty-two thousand, seven hundred forty-nine".