138888887471 has 2 divisors, whose sum is σ = 138888887472. Its totient is φ = 138888887470.

The previous prime is 138888887453. The next prime is 138888887513. The reversal of 138888887471 is 174788888831.

138888887471 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138888887471 is a prime.

It is a super-3 number, since 3×138888887471³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138888887395 and 138888887404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138888887441) 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, 69444443735 + 69444443736.

It is an arithmetic number, because the mean of its divisors is an integer number (69444443736).

Almost surely, 2^138888887471 is an apocalyptic number.

138888887471 is a deficient number, since it is larger than the sum of its proper divisors (1).

138888887471 is an equidigital number, since it uses as much as digits as its factorization.

138888887471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 154140672, while the sum is 71.

The spelling of 138888887471 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, eight hundred eighty-seven thousand, four hundred seventy-one".