13931981758243 has 2 divisors, whose sum is σ = 13931981758244. Its totient is φ = 13931981758242.

The previous prime is 13931981758159. The next prime is 13931981758283. The reversal of 13931981758243 is 34285718913931.

It is a strong prime.

It is an emirp because it is prime and its reverse (34285718913931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13931981758243 - 2⁹ = 13931981757731 is a prime.

It is not a weakly prime, because it can be changed into another prime (13931981758283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965990879121 + 6965990879122.

It is an arithmetic number, because the mean of its divisors is an integer number (6965990879122).

Almost surely, 2^{13931981758243} is an apocalyptic number.

13931981758243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931981758243 is an equidigital number, since it uses as much as digits as its factorization.

13931981758243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39191040, while the sum is 64.

The spelling of 13931981758243 in words is "thirteen trillion, nine hundred thirty-one billion, nine hundred eighty-one million, seven hundred fifty-eight thousand, two hundred forty-three".