138258259 has 2 divisors, whose sum is σ = 138258260. Its totient is φ = 138258258.

The previous prime is 138258251. The next prime is 138258293. The reversal of 138258259 is 952852831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138258259 - 2³ = 138258251 is a prime.

It is a super-2 number, since 2×138258259² = 38230692363422162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138258251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69129129 + 69129130.

It is an arithmetic number, because the mean of its divisors is an integer number (69129130).

Almost surely, 2^138258259 is an apocalyptic number.

138258259 is a deficient number, since it is larger than the sum of its proper divisors (1).

138258259 is an equidigital number, since it uses as much as digits as its factorization.

138258259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 138258259 is about 11758.3272194645. The cubic root of 138258259 is about 517.0870895493.

The spelling of 138258259 in words is "one hundred thirty-eight million, two hundred fifty-eight thousand, two hundred fifty-nine".