12891693079943 has 2 divisors, whose sum is σ = 12891693079944. Its totient is φ = 12891693079942.

The previous prime is 12891693079933. The next prime is 12891693080089. The reversal of 12891693079943 is 34997039619821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12891693079943 - 2³² = 12887398112647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12891693079933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6445846539971 + 6445846539972.

It is an arithmetic number, because the mean of its divisors is an integer number (6445846539972).

Almost surely, 2^{12891693079943} is an apocalyptic number.

12891693079943 is a deficient number, since it is larger than the sum of its proper divisors (1).

12891693079943 is an equidigital number, since it uses as much as digits as its factorization.

12891693079943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158723712, while the sum is 71.

The spelling of 12891693079943 in words is "twelve trillion, eight hundred ninety-one billion, six hundred ninety-three million, seventy-nine thousand, nine hundred forty-three".