138297717 has 12 divisors (see below), whose sum is σ = 199898400. Its totient is φ = 92136168.

The previous prime is 138297701. The next prime is 138297721. The reversal of 138297717 is 717792831.

It is not a de Polignac number, because 138297717 - 2⁴ = 138297701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138297767) 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 11 ways as a sum of consecutive naturals, for example, 11784 + ... + 20382.

It is an arithmetic number, because the mean of its divisors is an integer number (16658200).

Almost surely, 2^138297717 is an apocalyptic number.

It is an amenable number.

138297717 is a deficient number, since it is larger than the sum of its proper divisors (61600683).

138297717 is a wasteful number, since it uses less digits than its factorization.

138297717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392 (or 10389 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 138297717 is about 11760.0049744887. The cubic root of 138297717 is about 517.1362759580.

It can be divided in two parts, 1382 and 97717, that added together give a palindrome (99099).

The spelling of 138297717 in words is "one hundred thirty-eight million, two hundred ninety-seven thousand, seven hundred seventeen".