12543241439 has 2 divisors, whose sum is σ = 12543241440. Its totient is φ = 12543241438.

The previous prime is 12543241423. The next prime is 12543241441. The reversal of 12543241439 is 93414234521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12543241439 - 2⁴ = 12543241423 is a prime.

It is a Sophie Germain prime.

Together with 12543241441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543241489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271620719 + 6271620720.

It is an arithmetic number, because the mean of its divisors is an integer number (6271620720).

Almost surely, 2^12543241439 is an apocalyptic number.

12543241439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543241439 is an equidigital number, since it uses as much as digits as its factorization.

12543241439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The spelling of 12543241439 in words is "twelve billion, five hundred forty-three million, two hundred forty-one thousand, four hundred thirty-nine".