138144111 has 8 divisors (see below), whose sum is σ = 210505344. Its totient is φ = 78939480.

The previous prime is 138144107. The next prime is 138144119. The reversal of 138144111 is 111441831.

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

It is not a de Polignac number, because 138144111 - 2² = 138144107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138144119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289125 + ... + 3289166.

It is an arithmetic number, because the mean of its divisors is an integer number (26313168).

Almost surely, 2^138144111 is an apocalyptic number.

138144111 is a deficient number, since it is larger than the sum of its proper divisors (72361233).

138144111 is an equidigital number, since it uses as much as digits as its factorization.

138144111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578301.

The product of its digits is 384, while the sum is 24.

The square root of 138144111 is about 11753.4722954538. The cubic root of 138144111 is about 516.9447455312.

Adding to 138144111 its reverse (111441831), we get a palindrome (249585942).

The spelling of 138144111 in words is "one hundred thirty-eight million, one hundred forty-four thousand, one hundred eleven".