138750193 has 2 divisors, whose sum is σ = 138750194. Its totient is φ = 138750192.

The previous prime is 138750169. The next prime is 138750229. The reversal of 138750193 is 391057831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137522529 + 1227664 = 11727^2 + 1108^2 .

It is an emirp because it is prime and its reverse (391057831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138750193 is a prime.

It is not a weakly prime, because it can be changed into another prime (138750793) 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, 69375096 + 69375097.

It is an arithmetic number, because the mean of its divisors is an integer number (69375097).

Almost surely, 2^138750193 is an apocalyptic number.

It is an amenable number.

138750193 is a deficient number, since it is larger than the sum of its proper divisors (1).

138750193 is an equidigital number, since it uses as much as digits as its factorization.

138750193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 138750193 is about 11779.2271817806. The cubic root of 138750193 is about 517.6996427625.

The spelling of 138750193 in words is "one hundred thirty-eight million, seven hundred fifty thousand, one hundred ninety-three".