138517075 has 6 divisors (see below), whose sum is σ = 171761204. Its totient is φ = 110813640.

The previous prime is 138517039. The next prime is 138517081. The reversal of 138517075 is 570715831.

It is a de Polignac number, because none of the positive numbers 2^k-138517075 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 2770317 + ... + 2770366.

Almost surely, 2^138517075 is an apocalyptic number.

138517075 is a deficient number, since it is larger than the sum of its proper divisors (33244129).

138517075 is an equidigital number, since it uses as much as digits as its factorization.

138517075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540693 (or 5540688 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

The square root of 138517075 is about 11769.3277208174. The cubic root of 138517075 is about 517.4095464519.

The spelling of 138517075 in words is "one hundred thirty-eight million, five hundred seventeen thousand, seventy-five".