12447432731 has 2 divisors, whose sum is σ = 12447432732. Its totient is φ = 12447432730.

The previous prime is 12447432709. The next prime is 12447432749. The reversal of 12447432731 is 13723474421.

12447432731 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 is an emirp because it is prime and its reverse (13723474421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12447432731 - 2¹⁴ = 12447416347 is a prime.

It is a super-2 number, since 2×12447432731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12447435731) 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, 6223716365 + 6223716366.

It is an arithmetic number, because the mean of its divisors is an integer number (6223716366).

Almost surely, 2^12447432731 is an apocalyptic number.

12447432731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12447432731 is an equidigital number, since it uses as much as digits as its factorization.

12447432731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The spelling of 12447432731 in words is "twelve billion, four hundred forty-seven million, four hundred thirty-two thousand, seven hundred thirty-one".