171493 has 4 divisors (see below), whose sum is σ = 196000. Its totient is φ = 146988.

The previous prime is 171491. The next prime is 171517. The reversal of 171493 is 394171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 394171 = 277 ⋅1423.

It is a cyclic number.

It is not a de Polignac number, because 171493 - 2¹ = 171491 is a prime.

171493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12243 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (49000).

2¹⁷¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

171493 is a deficient number, since it is larger than the sum of its proper divisors (24507).

171493 is an equidigital number, since it uses as much as digits as its factorization.

171493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24506.

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

The square root of 171493 is about 414.1171331882. The cubic root of 171493 is about 55.5582809033.

The spelling of 171493 in words is "one hundred seventy-one thousand, four hundred ninety-three".