138337717 has 16 divisors (see below), whose sum is σ = 163609600. Its totient is φ = 114462720.

The previous prime is 138337711. The next prime is 138337733. The reversal of 138337717 is 717733831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138337717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138337717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138337711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166459 + ... + 167287.

It is an arithmetic number, because the mean of its divisors is an integer number (10225600).

Almost surely, 2^138337717 is an apocalyptic number.

It is an amenable number.

138337717 is a deficient number, since it is larger than the sum of its proper divisors (25271883).

138337717 is an equidigital number, since it uses as much as digits as its factorization.

138337717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its digits is 74088, while the sum is 40.

The square root of 138337717 is about 11761.7055310869. The cubic root of 138337717 is about 517.1861284490.

The spelling of 138337717 in words is "one hundred thirty-eight million, three hundred thirty-seven thousand, seven hundred seventeen".