138582517 has 4 divisors (see below), whose sum is σ = 138689856. Its totient is φ = 138475180.

The previous prime is 138582497. The next prime is 138582539. The reversal of 138582517 is 715285831.

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 a de Polignac number, because none of the positive numbers 2^k-138582517 is a prime.

It is a super-2 number, since 2×138582517² = 38410228036110578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138582517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138586517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51709 + ... + 54322.

It is an arithmetic number, because the mean of its divisors is an integer number (34672464).

Almost surely, 2^138582517 is an apocalyptic number.

It is an amenable number.

138582517 is a deficient number, since it is larger than the sum of its proper divisors (107339).

138582517 is a wasteful number, since it uses less digits than its factorization.

138582517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107338.

The product of its digits is 67200, while the sum is 40.

The square root of 138582517 is about 11772.1075853052. The cubic root of 138582517 is about 517.4910165150.

The spelling of 138582517 in words is "one hundred thirty-eight million, five hundred eighty-two thousand, five hundred seventeen".