138838344727 has 2 divisors, whose sum is σ = 138838344728. Its totient is φ = 138838344726.

The previous prime is 138838344721. The next prime is 138838344739. The reversal of 138838344727 is 727443838831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138838344727 - 2¹¹ = 138838342679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138838344721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69419172363 + 69419172364.

It is an arithmetic number, because the mean of its divisors is an integer number (69419172364).

Almost surely, 2^138838344727 is an apocalyptic number.

138838344727 is a deficient number, since it is larger than the sum of its proper divisors (1).

138838344727 is an equidigital number, since it uses as much as digits as its factorization.

138838344727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21676032, while the sum is 58.

The spelling of 138838344727 in words is "one hundred thirty-eight billion, eight hundred thirty-eight million, three hundred forty-four thousand, seven hundred twenty-seven".