138888750071 has 2 divisors, whose sum is σ = 138888750072. Its totient is φ = 138888750070.

The previous prime is 138888750067. The next prime is 138888750137. The reversal of 138888750071 is 170057888831.

138888750071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (170057888831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138888750071 - 2² = 138888750067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138888749989 and 138888750016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138888750001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69444375035 + 69444375036.

It is an arithmetic number, because the mean of its divisors is an integer number (69444375036).

Almost surely, 2^138888750071 is an apocalyptic number.

138888750071 is a deficient number, since it is larger than the sum of its proper divisors (1).

138888750071 is an equidigital number, since it uses as much as digits as its factorization.

138888750071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3010560, while the sum is 56.

The spelling of 138888750071 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, seven hundred fifty thousand, seventy-one".