138106533 has 8 divisors (see below), whose sum is σ = 189119008. Its totient is φ = 89582544.

The previous prime is 138106517. The next prime is 138106541. The reversal of 138106533 is 335601831.

138106533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138106533 - 2⁴ = 138106517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138106533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138101533) 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, 621991 + ... + 622212.

It is an arithmetic number, because the mean of its divisors is an integer number (23639876).

Almost surely, 2^138106533 is an apocalyptic number.

It is an amenable number.

138106533 is a deficient number, since it is larger than the sum of its proper divisors (51012475).

138106533 is a wasteful number, since it uses less digits than its factorization.

138106533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244243.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 138106533 is about 11751.8735953039. The cubic root of 138106533 is about 516.8978681286.

The spelling of 138106533 in words is "one hundred thirty-eight million, one hundred six thousand, five hundred thirty-three".