12993461813 has 2 divisors, whose sum is σ = 12993461814. Its totient is φ = 12993461812.

The previous prime is 12993461773. The next prime is 12993461843. The reversal of 12993461813 is 31816439921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11350132369 + 1643329444 = 106537^2 + 40538^2 .

It is a cyclic number.

It is not a de Polignac number, because 12993461813 - 2⁶ = 12993461749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12993461843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6496730906 + 6496730907.

It is an arithmetic number, because the mean of its divisors is an integer number (6496730907).

Almost surely, 2^12993461813 is an apocalyptic number.

It is an amenable number.

12993461813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12993461813 is an equidigital number, since it uses as much as digits as its factorization.

12993461813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The spelling of 12993461813 in words is "twelve billion, nine hundred ninety-three million, four hundred sixty-one thousand, eight hundred thirteen".