138105543 has 8 divisors (see below), whose sum is σ = 184323456. Its totient is φ = 91979000.

The previous prime is 138105533. The next prime is 138105563. The reversal of 138105543 is 345501831.

138105543 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 a cyclic number.

It is not a de Polignac number, because 138105543 - 2⁸ = 138105287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138105543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138105533) 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, 19233 + ... + 25418.

It is an arithmetic number, because the mean of its divisors is an integer number (23040432).

Almost surely, 2^138105543 is an apocalyptic number.

138105543 is a deficient number, since it is larger than the sum of its proper divisors (46217913).

138105543 is a wasteful number, since it uses less digits than its factorization.

138105543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45685.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 138105543 is about 11751.8314742852. The cubic root of 138105543 is about 516.8966330190.

The spelling of 138105543 in words is "one hundred thirty-eight million, one hundred five thousand, five hundred forty-three".