138958075 has 6 divisors (see below), whose sum is σ = 172308044. Its totient is φ = 111166440.

The previous prime is 138958073. The next prime is 138958081. The reversal of 138958075 is 570859831.

It is not a de Polignac number, because 138958075 - 2¹ = 138958073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138958073) 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 in 5 ways as a sum of consecutive naturals, for example, 2779137 + ... + 2779186.

Almost surely, 2^138958075 is an apocalyptic number.

138958075 is a deficient number, since it is larger than the sum of its proper divisors (33349969).

138958075 is an equidigital number, since it uses as much as digits as its factorization.

138958075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558333 (or 5558328 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 138958075 is about 11788.0479724168. The cubic root of 138958075 is about 517.9580609844.

The spelling of 138958075 in words is "one hundred thirty-eight million, nine hundred fifty-eight thousand, seventy-five".