12940643143 has 2 divisors, whose sum is σ = 12940643144. Its totient is φ = 12940643142.

The previous prime is 12940643141. The next prime is 12940643147. The reversal of 12940643143 is 34134604921.

It is a weak prime.

It is an emirp because it is prime and its reverse (34134604921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12940643143 - 2¹ = 12940643141 is a prime.

Together with 12940643141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12940643141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6470321571 + 6470321572.

It is an arithmetic number, because the mean of its divisors is an integer number (6470321572).

Almost surely, 2^12940643143 is an apocalyptic number.

12940643143 is a deficient number, since it is larger than the sum of its proper divisors (1).

12940643143 is an equidigital number, since it uses as much as digits as its factorization.

12940643143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 12940643143 in words is "twelve billion, nine hundred forty million, six hundred forty-three thousand, one hundred forty-three".