12543340343 has 2 divisors, whose sum is σ = 12543340344. Its totient is φ = 12543340342.

The previous prime is 12543340331. The next prime is 12543340357. The reversal of 12543340343 is 34304334521.

It is a weak prime.

It is an emirp because it is prime and its reverse (34304334521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12543340343 - 2⁶ = 12543340279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543340643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271670171 + 6271670172.

It is an arithmetic number, because the mean of its divisors is an integer number (6271670172).

Almost surely, 2^12543340343 is an apocalyptic number.

12543340343 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543340343 is an equidigital number, since it uses as much as digits as its factorization.

12543340343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 12543340343 its reverse (34304334521), we get a palindrome (46847674864).

The spelling of 12543340343 in words is "twelve billion, five hundred forty-three million, three hundred forty thousand, three hundred forty-three".