171289393 has 8 divisors (see below), whose sum is σ = 186970176. Its totient is φ = 155626800.

The previous prime is 171289387. The next prime is 171289397. The reversal of 171289393 is 393982171.

171289393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 171289393 - 2⁹ = 171288881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171289397) 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, 21828 + ... + 28618.

It is an arithmetic number, because the mean of its divisors is an integer number (23371272).

Almost surely, 2^171289393 is an apocalyptic number.

It is an amenable number.

171289393 is a deficient number, since it is larger than the sum of its proper divisors (15680783).

171289393 is a wasteful number, since it uses less digits than its factorization.

171289393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095.

The product of its digits is 81648, while the sum is 43.

The square root of 171289393 is about 13087.7573709173. The cubic root of 171289393 is about 555.3628479729.

The spelling of 171289393 in words is "one hundred seventy-one million, two hundred eighty-nine thousand, three hundred ninety-three".