12923449806389 has 2 divisors, whose sum is σ = 12923449806390. Its totient is φ = 12923449806388.

The previous prime is 12923449806367. The next prime is 12923449806451. The reversal of 12923449806389 is 98360894432921.

12923449806389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9995980136164 + 2927469670225 = 3161642^2 + 1710985^2 .

It is a cyclic number.

It is not a de Polignac number, because 12923449806389 - 2⁸ = 12923449806133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12923449806349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6461724903194 + 6461724903195.

It is an arithmetic number, because the mean of its divisors is an integer number (6461724903195).

Almost surely, 2^{12923449806389} is an apocalyptic number.

It is an amenable number.

12923449806389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12923449806389 is an equidigital number, since it uses as much as digits as its factorization.

12923449806389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161243136, while the sum is 68.

The spelling of 12923449806389 in words is "twelve trillion, nine hundred twenty-three billion, four hundred forty-nine million, eight hundred six thousand, three hundred eighty-nine".