138118959 has 48 divisors (see below), whose sum is σ = 228632320. Its totient is φ = 82328400.

The previous prime is 138118949. The next prime is 138118969. The reversal of 138118959 is 959811831.

It is an interprime number because it is at equal distance from previous prime (138118949) and next prime (138118969).

It is not a de Polignac number, because 138118959 - 2¹⁵ = 138086191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138118949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218574 + ... + 219204.

Almost surely, 2^138118959 is an apocalyptic number.

138118959 is a deficient number, since it is larger than the sum of its proper divisors (90513361).

138118959 is a wasteful number, since it uses less digits than its factorization.

138118959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 712 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 138118959 is about 11752.4022650690. The cubic root of 138118959 is about 516.9133701235.

The spelling of 138118959 in words is "one hundred thirty-eight million, one hundred eighteen thousand, nine hundred fifty-nine".