138063509 has 2 divisors, whose sum is σ = 138063510. Its totient is φ = 138063508.

The previous prime is 138063493. The next prime is 138063529. The reversal of 138063509 is 905360831.

138063509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105001009 + 33062500 = 10247^2 + 5750^2 .

It is a cyclic number.

It is not a de Polignac number, because 138063509 - 2⁴ = 138063493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138063529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69031754 + 69031755.

It is an arithmetic number, because the mean of its divisors is an integer number (69031755).

Almost surely, 2^138063509 is an apocalyptic number.

It is an amenable number.

138063509 is a deficient number, since it is larger than the sum of its proper divisors (1).

138063509 is an equidigital number, since it uses as much as digits as its factorization.

138063509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 138063509 is about 11750.0429360918. The cubic root of 138063509 is about 516.8441865657.

The spelling of 138063509 in words is "one hundred thirty-eight million, sixty-three thousand, five hundred nine".