138114181 has 2 divisors, whose sum is σ = 138114182. Its totient is φ = 138114180.

The previous prime is 138114169. The next prime is 138114233. The reversal of 138114181 is 181411831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94672900 + 43441281 = 9730^2 + 6591^2 .

It is an emirp because it is prime and its reverse (181411831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138114181 - 2⁹ = 138113669 is a prime.

It is a super-2 number, since 2×138114181² = 38151053986601522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138114101) 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 as a sum of consecutive naturals, namely, 69057090 + 69057091.

It is an arithmetic number, because the mean of its divisors is an integer number (69057091).

Almost surely, 2^138114181 is an apocalyptic number.

It is an amenable number.

138114181 is a deficient number, since it is larger than the sum of its proper divisors (1).

138114181 is an equidigital number, since it uses as much as digits as its factorization.

138114181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 28.

The square root of 138114181 is about 11752.1989857218. The cubic root of 138114181 is about 516.9074094632.

The spelling of 138114181 in words is "one hundred thirty-eight million, one hundred fourteen thousand, one hundred eighty-one".