138385193 has 2 divisors, whose sum is σ = 138385194. Its totient is φ = 138385192.

The previous prime is 138385183. The next prime is 138385199. The reversal of 138385193 is 391583831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136726249 + 1658944 = 11693^2 + 1288^2 .

It is a cyclic number.

It is not a de Polignac number, because 138385193 - 2⁸ = 138384937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138385193.

It is not a weakly prime, because it can be changed into another prime (138385199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69192596 + 69192597.

It is an arithmetic number, because the mean of its divisors is an integer number (69192597).

Almost surely, 2^138385193 is an apocalyptic number.

It is an amenable number.

138385193 is a deficient number, since it is larger than the sum of its proper divisors (1).

138385193 is an equidigital number, since it uses as much as digits as its factorization.

138385193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 138385193 is about 11763.7236026694. The cubic root of 138385193 is about 517.2452859004.

The spelling of 138385193 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, one hundred ninety-three".