138261033 has 16 divisors (see below), whose sum is σ = 205027200. Its totient is φ = 92085840.

The previous prime is 138260989. The next prime is 138261041. The reversal of 138261033 is 330162831.

It is a happy number.

138261033 is a `hidden beast` number, since 13 + 8 + 2 + 610 + 33 = 666.

It is not a de Polignac number, because 138261033 - 2¹³ = 138252841 is a prime.

It is a super-2 number, since 2×138261033² = 38232226492454178, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 138260988 and 138261006.

It is not an unprimeable number, because it can be changed into a prime (138261083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39103 + ... + 42491.

It is an arithmetic number, because the mean of its divisors is an integer number (12814200).

Almost surely, 2^138261033 is an apocalyptic number.

It is an amenable number.

138261033 is a deficient number, since it is larger than the sum of its proper divisors (66766167).

138261033 is a wasteful number, since it uses less digits than its factorization.

138261033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909 (or 4903 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 138261033 is about 11758.4451778286. The cubic root of 138261033 is about 517.0905477876.

The spelling of 138261033 in words is "one hundred thirty-eight million, two hundred sixty-one thousand, thirty-three".