138008459 has 2 divisors, whose sum is σ = 138008460. Its totient is φ = 138008458.

The previous prime is 138008443. The next prime is 138008467. The reversal of 138008459 is 954800831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138008459 - 2⁴ = 138008443 is a prime.

It is not a weakly prime, because it can be changed into another prime (138008489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69004229 + 69004230.

It is an arithmetic number, because the mean of its divisors is an integer number (69004230).

Almost surely, 2^138008459 is an apocalyptic number.

138008459 is a deficient number, since it is larger than the sum of its proper divisors (1).

138008459 is an equidigital number, since it uses as much as digits as its factorization.

138008459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 138008459 is about 11747.7001579032. The cubic root of 138008459 is about 516.7754837513.

The spelling of 138008459 in words is "one hundred thirty-eight million, eight thousand, four hundred fifty-nine".