138132517 has 4 divisors (see below), whose sum is σ = 138272896. Its totient is φ = 137992140.

The previous prime is 138132509. The next prime is 138132521. The reversal of 138132517 is 715231831.

138132517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138132517 - 2³ = 138132509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138132817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68703 + ... + 70684.

It is an arithmetic number, because the mean of its divisors is an integer number (34568224).

Almost surely, 2^138132517 is an apocalyptic number.

It is an amenable number.

138132517 is a deficient number, since it is larger than the sum of its proper divisors (140379).

138132517 is an equidigital number, since it uses as much as digits as its factorization.

138132517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140378.

The product of its digits is 5040, while the sum is 31.

The square root of 138132517 is about 11752.9790691552. The cubic root of 138132517 is about 516.9302832787.

The spelling of 138132517 in words is "one hundred thirty-eight million, one hundred thirty-two thousand, five hundred seventeen".