138888684589 has 2 divisors, whose sum is σ = 138888684590. Its totient is φ = 138888684588.

The previous prime is 138888684577. The next prime is 138888684601. The reversal of 138888684589 is 985486888831.

It is a balanced prime because it is at equal distance from previous prime (138888684577) and next prime (138888684601).

It can be written as a sum of positive squares in only one way, i.e., 112146623689 + 26742060900 = 334883^2 + 163530^2 .

It is an emirp because it is prime and its reverse (985486888831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138888684589 - 2³¹ = 136741200941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138888684569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69444342294 + 69444342295.

It is an arithmetic number, because the mean of its divisors is an integer number (69444342295).

Almost surely, 2^138888684589 is an apocalyptic number.

It is an amenable number.

138888684589 is a deficient number, since it is larger than the sum of its proper divisors (1).

138888684589 is an equidigital number, since it uses as much as digits as its factorization.

138888684589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 849346560, while the sum is 76.

The spelling of 138888684589 in words is "one hundred thirty-eight billion, eight hundred eighty-eight million, six hundred eighty-four thousand, five hundred eighty-nine".