138195111 has 8 divisors (see below), whose sum is σ = 189240304. Its totient is φ = 89640000.

The previous prime is 138195067. The next prime is 138195119. The reversal of 138195111 is 111591831.

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

It is not a de Polignac number, because 138195111 - 2⁶ = 138195047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138195119) 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 7 ways as a sum of consecutive naturals, for example, 622390 + ... + 622611.

It is an arithmetic number, because the mean of its divisors is an integer number (23655038).

Almost surely, 2^138195111 is an apocalyptic number.

138195111 is a deficient number, since it is larger than the sum of its proper divisors (51045193).

138195111 is a wasteful number, since it uses less digits than its factorization.

138195111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245041.

The product of its digits is 1080, while the sum is 30.

The square root of 138195111 is about 11755.6416668764. The cubic root of 138195111 is about 517.0083528712.

The spelling of 138195111 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, one hundred eleven".