138065659 has 2 divisors, whose sum is σ = 138065660. Its totient is φ = 138065658.

The previous prime is 138065621. The next prime is 138065699. The reversal of 138065659 is 956560831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138065659 - 2¹³ = 138057467 is a prime.

It is equal to p_7808992 and since 138065659 and 7808992 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (138065699) 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, 69032829 + 69032830.

It is an arithmetic number, because the mean of its divisors is an integer number (69032830).

Almost surely, 2^138065659 is an apocalyptic number.

138065659 is a deficient number, since it is larger than the sum of its proper divisors (1).

138065659 is an equidigital number, since it uses as much as digits as its factorization.

138065659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 138065659 is about 11750.1344247630. The cubic root of 138065659 is about 516.8468694113.

The spelling of 138065659 in words is "one hundred thirty-eight million, sixty-five thousand, six hundred fifty-nine".