138385375 has 8 divisors (see below), whose sum is σ = 172705104. Its totient is φ = 110708200.

The previous prime is 138385369. The next prime is 138385381. The reversal of 138385375 is 573583831.

It is an interprime number because it is at equal distance from previous prime (138385369) and next prime (138385381).

It is not a de Polignac number, because 138385375 - 2³ = 138385367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553417 + ... + 553666.

It is an arithmetic number, because the mean of its divisors is an integer number (21588138).

Almost surely, 2^138385375 is an apocalyptic number.

138385375 is a deficient number, since it is larger than the sum of its proper divisors (34319729).

138385375 is an equidigital number, since it uses as much as digits as its factorization.

138385375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107098 (or 1107088 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 138385375 is about 11763.7313383127. The cubic root of 138385375 is about 517.2455126553.

The spelling of 138385375 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, three hundred seventy-five".