138889922797 has 2 divisors, whose sum is σ = 138889922798. Its totient is φ = 138889922796.

The previous prime is 138889922761. The next prime is 138889922881. The reversal of 138889922797 is 797229988831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120969013636 + 17920909161 = 347806^2 + 133869^2 .

It is an emirp because it is prime and its reverse (797229988831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138889922797 - 2²⁷ = 138755705069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138889922747) 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, 69444961398 + 69444961399.

It is an arithmetic number, because the mean of its divisors is an integer number (69444961399).

Almost surely, 2^138889922797 is an apocalyptic number.

It is an amenable number.

138889922797 is a deficient number, since it is larger than the sum of its proper divisors (1).

138889922797 is an equidigital number, since it uses as much as digits as its factorization.

138889922797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 73.

The spelling of 138889922797 in words is "one hundred thirty-eight billion, eight hundred eighty-nine million, nine hundred twenty-two thousand, seven hundred ninety-seven".