138611259 has 6 divisors (see below), whose sum is σ = 200216276. Its totient is φ = 92407500.

The previous prime is 138611243. The next prime is 138611269. The reversal of 138611259 is 952116831.

138611259 is a `hidden beast` number, since 1 + 38 + 611 + 2 + 5 + 9 = 666.

It is not a de Polignac number, because 138611259 - 2⁴ = 138611243 is a prime.

It is a super-2 number, since 2×138611259² = 38426162243130162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138611219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7700617 + ... + 7700634.

Almost surely, 2^138611259 is an apocalyptic number.

138611259 is a deficient number, since it is larger than the sum of its proper divisors (61605017).

138611259 is a wasteful number, since it uses less digits than its factorization.

138611259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401257 (or 15401254 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 138611259 is about 11773.3282889759. The cubic root of 138611259 is about 517.5267899035.

The spelling of 138611259 in words is "one hundred thirty-eight million, six hundred eleven thousand, two hundred fifty-nine".