138105273 has 8 divisors (see below), whose sum is σ = 184363200. Its totient is φ = 91958768.

The previous prime is 138105241. The next prime is 138105283. The reversal of 138105273 is 372501831.

138105273 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 138105273 - 2⁵ = 138105241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138105273.

It is not an unprimeable number, because it can be changed into a prime (138105283) 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, 24918 + ... + 29951.

It is an arithmetic number, because the mean of its divisors is an integer number (23045400).

Almost surely, 2^138105273 is an apocalyptic number.

It is an amenable number.

138105273 is a deficient number, since it is larger than the sum of its proper divisors (46257927).

138105273 is an equidigital number, since it uses as much as digits as its factorization.

138105273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55711.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 138105273 is about 11751.8199867084. The cubic root of 138105273 is about 516.8962961700.

The spelling of 138105273 in words is "one hundred thirty-eight million, one hundred five thousand, two hundred seventy-three".