138843113 has 2 divisors, whose sum is σ = 138843114. Its totient is φ = 138843112.

The previous prime is 138843083. The next prime is 138843121. The reversal of 138843113 is 311348831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75290329 + 63552784 = 8677^2 + 7972^2 .

It is a cyclic number.

It is not a de Polignac number, because 138843113 - 2⁸ = 138842857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138843113.

It is not a weakly prime, because it can be changed into another prime (138843143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69421556 + 69421557.

It is an arithmetic number, because the mean of its divisors is an integer number (69421557).

Almost surely, 2^138843113 is an apocalyptic number.

It is an amenable number.

138843113 is a deficient number, since it is larger than the sum of its proper divisors (1).

138843113 is an equidigital number, since it uses as much as digits as its factorization.

138843113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 138843113 is about 11783.1707532396. The cubic root of 138843113 is about 517.8151835420.

The spelling of 138843113 in words is "one hundred thirty-eight million, eight hundred forty-three thousand, one hundred thirteen".