138328712447129 has 2 divisors, whose sum is σ = 138328712447130. Its totient is φ = 138328712447128.

The previous prime is 138328712447111. The next prime is 138328712447179. The reversal of 138328712447129 is 921744217823831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76839950905600 + 61488761541529 = 8765840^2 + 7841477^2 .

It is an emirp because it is prime and its reverse (921744217823831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138328712447129 is a prime.

It is not a weakly prime, because it can be changed into another prime (138328712447179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69164356223564 + 69164356223565.

It is an arithmetic number, because the mean of its divisors is an integer number (69164356223565).

Almost surely, 2^{138328712447129} is an apocalyptic number.

It is an amenable number.

138328712447129 is a deficient number, since it is larger than the sum of its proper divisors (1).

138328712447129 is an equidigital number, since it uses as much as digits as its factorization.

138328712447129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 62.

The spelling of 138328712447129 in words is "one hundred thirty-eight trillion, three hundred twenty-eight billion, seven hundred twelve million, four hundred forty-seven thousand, one hundred twenty-nine".