171138193 has 8 divisors (see below), whose sum is σ = 184737600. Its totient is φ = 158052048.

The previous prime is 171138181. The next prime is 171138203. The reversal of 171138193 is 391831171.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171138193 is a prime.

It is a super-2 number, since 2×171138193² = 58576562206610498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171138103) 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 7 ways as a sum of consecutive naturals, for example, 127623 + ... + 128956.

It is an arithmetic number, because the mean of its divisors is an integer number (23092200).

Almost surely, 2^171138193 is an apocalyptic number.

It is an amenable number.

171138193 is a deficient number, since it is larger than the sum of its proper divisors (13599407).

171138193 is a wasteful number, since it uses less digits than its factorization.

171138193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256631.

The product of its digits is 4536, while the sum is 34.

The square root of 171138193 is about 13081.9797049223. The cubic root of 171138193 is about 555.1993905228.

The spelling of 171138193 in words is "one hundred seventy-one million, one hundred thirty-eight thousand, one hundred ninety-three".