138811147 has 2 divisors, whose sum is σ = 138811148. Its totient is φ = 138811146.

The previous prime is 138811111. The next prime is 138811151. The reversal of 138811147 is 741118831.

It is a strong prime.

It is an emirp because it is prime and its reverse (741118831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138811147 - 2⁷ = 138811019 is a prime.

It is not a weakly prime, because it can be changed into another prime (138812147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69405573 + 69405574.

It is an arithmetic number, because the mean of its divisors is an integer number (69405574).

Almost surely, 2^138811147 is an apocalyptic number.

138811147 is a deficient number, since it is larger than the sum of its proper divisors (1).

138811147 is an equidigital number, since it uses as much as digits as its factorization.

138811147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 34.

The square root of 138811147 is about 11781.8142490874. The cubic root of 138811147 is about 517.7754414420.

Adding to 138811147 its reverse (741118831), we get a palindrome (879929978).

The spelling of 138811147 in words is "one hundred thirty-eight million, eight hundred eleven thousand, one hundred forty-seven".