138680975 has 24 divisors (see below), whose sum is σ = 176238720. Its totient is φ = 108218720.

The previous prime is 138680959. The next prime is 138681013. The reversal of 138680975 is 579086831.

It is a happy number.

It is not a de Polignac number, because 138680975 - 2⁴ = 138680959 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 246044 + ... + 246606.

It is an arithmetic number, because the mean of its divisors is an integer number (7343280).

Almost surely, 2^138680975 is an apocalyptic number.

138680975 is a deficient number, since it is larger than the sum of its proper divisors (37557745).

138680975 is a wasteful number, since it uses less digits than its factorization.

138680975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 794 counting only the distinct ones).

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

The square root of 138680975 is about 11776.2886768285. The cubic root of 138680975 is about 517.6135405535.

The spelling of 138680975 in words is "one hundred thirty-eight million, six hundred eighty thousand, nine hundred seventy-five".