138000388789 has 2 divisors, whose sum is σ = 138000388790. Its totient is φ = 138000388788.

The previous prime is 138000388739. The next prime is 138000388891. The reversal of 138000388789 is 987883000831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136499213764 + 1501175025 = 369458^2 + 38745^2 .

It is a cyclic number.

It is not a de Polignac number, because 138000388789 - 2⁷ = 138000388661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138000388739) 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, 69000194394 + 69000194395.

It is an arithmetic number, because the mean of its divisors is an integer number (69000194395).

Almost surely, 2^138000388789 is an apocalyptic number.

It is an amenable number.

138000388789 is a deficient number, since it is larger than the sum of its proper divisors (1).

138000388789 is an equidigital number, since it uses as much as digits as its factorization.

138000388789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 138000388789 in words is "one hundred thirty-eight billion, three hundred eighty-eight thousand, seven hundred eighty-nine".