138817317 has 8 divisors (see below), whose sum is σ = 185270400. Its totient is φ = 92454560.

The previous prime is 138817297. The next prime is 138817337. The reversal of 138817317 is 713718831.

It is an interprime number because it is at equal distance from previous prime (138817297) and next prime (138817337).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138817317 - 2⁶ = 138817253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138817337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18909 + ... + 25202.

It is an arithmetic number, because the mean of its divisors is an integer number (23158800).

Almost surely, 2^138817317 is an apocalyptic number.

It is an amenable number.

138817317 is a deficient number, since it is larger than the sum of its proper divisors (46453083).

138817317 is a wasteful number, since it uses less digits than its factorization.

138817317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45163.

The product of its digits is 28224, while the sum is 39.

The square root of 138817317 is about 11782.0760904010. The cubic root of 138817317 is about 517.7831128412.

The spelling of 138817317 in words is "one hundred thirty-eight million, eight hundred seventeen thousand, three hundred seventeen".