138691035289 has 2 divisors, whose sum is σ = 138691035290. Its totient is φ = 138691035288.

The previous prime is 138691035187. The next prime is 138691035293. The reversal of 138691035289 is 982530196831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96405282064 + 42285753225 = 310492^2 + 205635^2 .

It is a cyclic number.

It is not a de Polignac number, because 138691035289 - 2²³ = 138682646681 is a prime.

It is not a weakly prime, because it can be changed into another prime (138691035389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69345517644 + 69345517645.

It is an arithmetic number, because the mean of its divisors is an integer number (69345517645).

Almost surely, 2^138691035289 is an apocalyptic number.

It is an amenable number.

138691035289 is a deficient number, since it is larger than the sum of its proper divisors (1).

138691035289 is an equidigital number, since it uses as much as digits as its factorization.

138691035289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 138691035289 in words is "one hundred thirty-eight billion, six hundred ninety-one million, thirty-five thousand, two hundred eighty-nine".