138688027399 has 2 divisors, whose sum is σ = 138688027400. Its totient is φ = 138688027398.

The previous prime is 138688027393. The next prime is 138688027441. The reversal of 138688027399 is 993720886831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138688027399 - 2³ = 138688027391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138688027399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138688027391) 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, 69344013699 + 69344013700.

It is an arithmetic number, because the mean of its divisors is an integer number (69344013700).

Almost surely, 2^138688027399 is an apocalyptic number.

138688027399 is a deficient number, since it is larger than the sum of its proper divisors (1).

138688027399 is an equidigital number, since it uses as much as digits as its factorization.

138688027399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 138688027399 in words is "one hundred thirty-eight billion, six hundred eighty-eight million, twenty-seven thousand, three hundred ninety-nine".