138011105 has 4 divisors (see below), whose sum is σ = 165613332. Its totient is φ = 110408880.

The previous prime is 138011053. The next prime is 138011141. The reversal of 138011105 is 501110831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86415616 + 51595489 = 9296^2 + 7183^2 .

It is not a de Polignac number, because 138011105 - 2⁸ = 138010849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13801106 + ... + 13801115.

It is an arithmetic number, because the mean of its divisors is an integer number (41403333).

Almost surely, 2^138011105 is an apocalyptic number.

It is an amenable number.

138011105 is a deficient number, since it is larger than the sum of its proper divisors (27602227).

138011105 is an equidigital number, since it uses as much as digits as its factorization.

138011105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27602226.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 138011105 is about 11747.8127751510. The cubic root of 138011105 is about 516.7787863972.

Adding to 138011105 its reverse (501110831), we get a palindrome (639121936).

The spelling of 138011105 in words is "one hundred thirty-eight million, eleven thousand, one hundred five".