138689075 has 48 divisors (see below), whose sum is σ = 211057920. Its totient is φ = 88283520.

The previous prime is 138689069. The next prime is 138689119. The reversal of 138689075 is 570986831.

It is a happy number.

It is not a de Polignac number, because 138689075 - 2¹⁰ = 138688051 is a prime.

It is an unprimeable number.

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 in 47 ways as a sum of consecutive naturals, for example, 175832 + ... + 176618.

It is an arithmetic number, because the mean of its divisors is an integer number (4397040).

Almost surely, 2^138689075 is an apocalyptic number.

138689075 is a deficient number, since it is larger than the sum of its proper divisors (72368845).

138689075 is a wasteful number, since it uses less digits than its factorization.

138689075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 138689075 is about 11776.6325832133. The cubic root of 138689075 is about 517.6236178503.

The spelling of 138689075 in words is "one hundred thirty-eight million, six hundred eighty-nine thousand, seventy-five".