12689339791489 has 2 divisors, whose sum is σ = 12689339791490. Its totient is φ = 12689339791488.

The previous prime is 12689339791483. The next prime is 12689339791543. The reversal of 12689339791489 is 98419793398621.

12689339791489 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., 12282978165264 + 406361626225 = 3504708^2 + 637465^2 .

It is a cyclic number.

It is not a de Polignac number, because 12689339791489 - 2³³ = 12680749856897 is a prime.

It is a super-2 number, since 2×12689339791489² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12689339791483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344669895744 + 6344669895745.

It is an arithmetic number, because the mean of its divisors is an integer number (6344669895745).

Almost surely, 2^{12689339791489} is an apocalyptic number.

It is an amenable number.

12689339791489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12689339791489 is an equidigital number, since it uses as much as digits as its factorization.

12689339791489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1269789696, while the sum is 79.

The spelling of 12689339791489 in words is "twelve trillion, six hundred eighty-nine billion, three hundred thirty-nine million, seven hundred ninety-one thousand, four hundred eighty-nine".