13438128997 has 2 divisors, whose sum is σ = 13438128998. Its totient is φ = 13438128996.

The previous prime is 13438128931. The next prime is 13438129013. The reversal of 13438128997 is 79982183431.

It is a happy number.

13438128997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10508505121 + 2929623876 = 102511^2 + 54126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13438128997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13438123997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719064498 + 6719064499.

It is an arithmetic number, because the mean of its divisors is an integer number (6719064499).

Almost surely, 2^13438128997 is an apocalyptic number.

It is an amenable number.

13438128997 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438128997 is an equidigital number, since it uses as much as digits as its factorization.

13438128997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The spelling of 13438128997 in words is "thirteen billion, four hundred thirty-eight million, one hundred twenty-eight thousand, nine hundred ninety-seven".