12943797858809 has 2 divisors, whose sum is σ = 12943797858810. Its totient is φ = 12943797858808.

The previous prime is 12943797858787. The next prime is 12943797858847. The reversal of 12943797858809 is 90885879734921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11553391344784 + 1390406514025 = 3399028^2 + 1179155^2 .

It is a cyclic number.

It is not a de Polignac number, because 12943797858809 - 2⁸ = 12943797858553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12943797858899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6471898929404 + 6471898929405.

It is an arithmetic number, because the mean of its divisors is an integer number (6471898929405).

Almost surely, 2^{12943797858809} is an apocalyptic number.

It is an amenable number.

12943797858809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12943797858809 is an equidigital number, since it uses as much as digits as its factorization.

12943797858809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2194698240, while the sum is 80.

The spelling of 12943797858809 in words is "twelve trillion, nine hundred forty-three billion, seven hundred ninety-seven million, eight hundred fifty-eight thousand, eight hundred nine".