138700875 has 32 divisors (see below), whose sum is σ = 244385856. Its totient is φ = 69619200.

The previous prime is 138700873. The next prime is 138700883. The reversal of 138700875 is 578007831.

It is not a de Polignac number, because 138700875 - 2¹ = 138700873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138700873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4504 + ... + 17253.

It is an arithmetic number, because the mean of its divisors is an integer number (7637058).

Almost surely, 2^138700875 is an apocalyptic number.

138700875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138700875 is a deficient number, since it is larger than the sum of its proper divisors (105684981).

138700875 is a wasteful number, since it uses less digits than its factorization.

138700875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21792 (or 21782 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 138700875 is about 11777.1335646667. The cubic root of 138700875 is about 517.6382976547.

The spelling of 138700875 in words is "one hundred thirty-eight million, seven hundred thousand, eight hundred seventy-five".