138170317 has 8 divisors (see below), whose sum is σ = 142767360. Its totient is φ = 133582080.

The previous prime is 138170273. The next prime is 138170327. The reversal of 138170317 is 713071831.

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 138170317 - 2¹¹ = 138168269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138170327) 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, 48813 + ... + 51565.

It is an arithmetic number, because the mean of its divisors is an integer number (17845920).

Almost surely, 2^138170317 is an apocalyptic number.

It is an amenable number.

138170317 is a deficient number, since it is larger than the sum of its proper divisors (4597043).

138170317 is a wasteful number, since it uses less digits than its factorization.

138170317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 138170317 is about 11754.5870620792. The cubic root of 138170317 is about 516.9774316814.

The spelling of 138170317 in words is "one hundred thirty-eight million, one hundred seventy thousand, three hundred seventeen".