12919703449 has 2 divisors, whose sum is σ = 12919703450. Its totient is φ = 12919703448.

The previous prime is 12919703393. The next prime is 12919703471. The reversal of 12919703449 is 94430791921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7437337600 + 5482365849 = 86240^2 + 74043^2 .

It is an emirp because it is prime and its reverse (94430791921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12919703449 - 2²³ = 12911314841 is a prime.

It is not a weakly prime, because it can be changed into another prime (12919703149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459851724 + 6459851725.

It is an arithmetic number, because the mean of its divisors is an integer number (6459851725).

Almost surely, 2^12919703449 is an apocalyptic number.

It is an amenable number.

12919703449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919703449 is an equidigital number, since it uses as much as digits as its factorization.

12919703449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 12919703449 in words is "twelve billion, nine hundred nineteen million, seven hundred three thousand, four hundred forty-nine".