138955133 has 8 divisors (see below), whose sum is σ = 141955200. Its totient is φ = 135978480.

The previous prime is 138955129. The next prime is 138955163. The reversal of 138955133 is 331559831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138955133 - 2² = 138955129 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 (138955123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6416 + ... + 17862.

It is an arithmetic number, because the mean of its divisors is an integer number (17744400).

Almost surely, 2^138955133 is an apocalyptic number.

It is an amenable number.

138955133 is a deficient number, since it is larger than the sum of its proper divisors (3000067).

138955133 is a wasteful number, since it uses less digits than its factorization.

138955133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11707.

The product of its digits is 48600, while the sum is 38.

The square root of 138955133 is about 11787.9231843442. The cubic root of 138955133 is about 517.9544055813.

The spelling of 138955133 in words is "one hundred thirty-eight million, nine hundred fifty-five thousand, one hundred thirty-three".