12966123349 has 2 divisors, whose sum is σ = 12966123350. Its totient is φ = 12966123348.

The previous prime is 12966123337. The next prime is 12966123367. The reversal of 12966123349 is 94332166921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7007364100 + 5958759249 = 83710^2 + 77193^2 .

It is a cyclic number.

It is not a de Polignac number, because 12966123349 - 2¹³ = 12966115157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12966123299 and 12966123308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12966123389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6483061674 + 6483061675.

It is an arithmetic number, because the mean of its divisors is an integer number (6483061675).

Almost surely, 2^12966123349 is an apocalyptic number.

It is an amenable number.

12966123349 is a deficient number, since it is larger than the sum of its proper divisors (1).

12966123349 is an equidigital number, since it uses as much as digits as its factorization.

12966123349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The spelling of 12966123349 in words is "twelve billion, nine hundred sixty-six million, one hundred twenty-three thousand, three hundred forty-nine".