138812147 has 2 divisors, whose sum is σ = 138812148. Its totient is φ = 138812146.

The previous prime is 138812137. The next prime is 138812209. The reversal of 138812147 is 741218831.

It is a weak prime.

It is an emirp because it is prime and its reverse (741218831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138812147 - 2⁴ = 138812131 is a prime.

It is not a weakly prime, because it can be changed into another prime (138812117) 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, 69406073 + 69406074.

It is an arithmetic number, because the mean of its divisors is an integer number (69406074).

Almost surely, 2^138812147 is an apocalyptic number.

138812147 is a deficient number, since it is larger than the sum of its proper divisors (1).

138812147 is an equidigital number, since it uses as much as digits as its factorization.

138812147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 138812147 is about 11781.8566872968. The cubic root of 138812147 is about 517.7766847961.

The spelling of 138812147 in words is "one hundred thirty-eight million, eight hundred twelve thousand, one hundred forty-seven".