138909741277 has 2 divisors, whose sum is σ = 138909741278. Its totient is φ = 138909741276.

The previous prime is 138909741239. The next prime is 138909741283. The reversal of 138909741277 is 772147909831.

It is a happy number.

138909741277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108574204036 + 30335537241 = 329506^2 + 174171^2 .

It is a cyclic number.

It is not a de Polignac number, because 138909741277 - 2¹⁹ = 138909216989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138909745277) 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, 69454870638 + 69454870639.

It is an arithmetic number, because the mean of its divisors is an integer number (69454870639).

Almost surely, 2^138909741277 is an apocalyptic number.

It is an amenable number.

138909741277 is a deficient number, since it is larger than the sum of its proper divisors (1).

138909741277 is an equidigital number, since it uses as much as digits as its factorization.

138909741277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The spelling of 138909741277 in words is "one hundred thirty-eight billion, nine hundred nine million, seven hundred forty-one thousand, two hundred seventy-seven".