171943 has 4 divisors (see below), whose sum is σ = 173320. Its totient is φ = 170568.

The previous prime is 171937. The next prime is 171947. The reversal of 171943 is 349171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171943 is a prime.

It is a Duffinian number.

171943 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (43330).

2¹⁷¹⁹⁴³ is an apocalyptic number.

171943 is a deficient number, since it is larger than the sum of its proper divisors (1377).

171943 is a wasteful number, since it uses less digits than its factorization.

171943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376.

The product of its digits is 756, while the sum is 25.

The square root of 171943 is about 414.6601017701. The cubic root of 171943 is about 55.6068336924.

The spelling of 171943 in words is "one hundred seventy-one thousand, nine hundred forty-three".