138532375 has 8 divisors (see below), whose sum is σ = 172888560. Its totient is φ = 110825800.

The previous prime is 138532367. The next prime is 138532411. The reversal of 138532375 is 573235831.

It is not a de Polignac number, because 138532375 - 2³ = 138532367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554005 + ... + 554254.

It is an arithmetic number, because the mean of its divisors is an integer number (21611070).

Almost surely, 2^138532375 is an apocalyptic number.

138532375 is a deficient number, since it is larger than the sum of its proper divisors (34356185).

138532375 is an equidigital number, since it uses as much as digits as its factorization.

138532375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108274 (or 1108264 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 138532375 is about 11769.9776975150. The cubic root of 138532375 is about 517.4285960278.

The spelling of 138532375 in words is "one hundred thirty-eight million, five hundred thirty-two thousand, three hundred seventy-five".