138917871023 has 2 divisors, whose sum is σ = 138917871024. Its totient is φ = 138917871022.

The previous prime is 138917871019. The next prime is 138917871047. The reversal of 138917871023 is 320178719831.

138917871023 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 not a de Polignac number, because 138917871023 - 2² = 138917871019 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138917870023) 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, 69458935511 + 69458935512.

It is an arithmetic number, because the mean of its divisors is an integer number (69458935512).

Almost surely, 2^138917871023 is an apocalyptic number.

138917871023 is a deficient number, since it is larger than the sum of its proper divisors (1).

138917871023 is an equidigital number, since it uses as much as digits as its factorization.

138917871023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 138917871023 in words is "one hundred thirty-eight billion, nine hundred seventeen million, eight hundred seventy-one thousand, twenty-three".