138142717 has 8 divisors (see below), whose sum is σ = 139766400. Its totient is φ = 136528224.

The previous prime is 138142709. The next prime is 138142733. The reversal of 138142717 is 717241831.

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 138142717 - 2³ = 138142709 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 (138142517) 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, 30634 + ... + 34852.

It is an arithmetic number, because the mean of its divisors is an integer number (17470800).

Almost surely, 2^138142717 is an apocalyptic number.

It is an amenable number.

138142717 is a deficient number, since it is larger than the sum of its proper divisors (1623683).

138142717 is a wasteful number, since it uses less digits than its factorization.

138142717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4595.

The product of its digits is 9408, while the sum is 34.

The square root of 138142717 is about 11753.4129936798. The cubic root of 138142717 is about 516.9430067108.

The spelling of 138142717 in words is "one hundred thirty-eight million, one hundred forty-two thousand, seven hundred seventeen".