138135531739 has 2 divisors, whose sum is σ = 138135531740. Its totient is φ = 138135531738.

The previous prime is 138135531731. The next prime is 138135531851. The reversal of 138135531739 is 937135531831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138135531739 - 2³ = 138135531731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138135531692 and 138135531701.

It is not a weakly prime, because it can be changed into another prime (138135531731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69067765869 + 69067765870.

It is an arithmetic number, because the mean of its divisors is an integer number (69067765870).

Almost surely, 2^138135531739 is an apocalyptic number.

138135531739 is a deficient number, since it is larger than the sum of its proper divisors (1).

138135531739 is an equidigital number, since it uses as much as digits as its factorization.

138135531739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 49.

The spelling of 138135531739 in words is "one hundred thirty-eight billion, one hundred thirty-five million, five hundred thirty-one thousand, seven hundred thirty-nine".