12388634389 has 2 divisors, whose sum is σ = 12388634390. Its totient is φ = 12388634388.

The previous prime is 12388634341. The next prime is 12388634441. The reversal of 12388634389 is 98343688321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10910847025 + 1477787364 = 104455^2 + 38442^2 .

It is an emirp because it is prime and its reverse (98343688321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12388634389 - 2²¹ = 12386537237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12388634329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6194317194 + 6194317195.

It is an arithmetic number, because the mean of its divisors is an integer number (6194317195).

Almost surely, 2^12388634389 is an apocalyptic number.

It is an amenable number.

12388634389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12388634389 is an equidigital number, since it uses as much as digits as its factorization.

12388634389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 55.

The spelling of 12388634389 in words is "twelve billion, three hundred eighty-eight million, six hundred thirty-four thousand, three hundred eighty-nine".