171494393 has 8 divisors (see below), whose sum is σ = 196166400. Its totient is φ = 146865600.

The previous prime is 171494353. The next prime is 171494441. The reversal of 171494393 is 393494171.

It is a happy number.

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

It is not a de Polignac number, because 171494393 - 2¹⁰ = 171493369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171494393.

It is not an unprimeable number, because it can be changed into a prime (171494333) 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, 1793 + ... + 18606.

It is an arithmetic number, because the mean of its divisors is an integer number (24520800).

Almost surely, 2^171494393 is an apocalyptic number.

It is an amenable number.

171494393 is a deficient number, since it is larger than the sum of its proper divisors (24672007).

171494393 is a wasteful number, since it uses less digits than its factorization.

171494393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21607.

The product of its digits is 81648, while the sum is 41.

The square root of 171494393 is about 13095.5867757042. The cubic root of 171494393 is about 555.5843133217.

The spelling of 171494393 in words is "one hundred seventy-one million, four hundred ninety-four thousand, three hundred ninety-three".