171117447 has 8 divisors (see below), whose sum is σ = 238076544. Its totient is φ = 109118328.

The previous prime is 171117437. The next prime is 171117449. The reversal of 171117447 is 744711171.

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

It is not a de Polignac number, because 171117447 - 2¹⁰ = 171116423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171117449) 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, 1239913 + ... + 1240050.

It is an arithmetic number, because the mean of its divisors is an integer number (29759568).

Almost surely, 2^171117447 is an apocalyptic number.

171117447 is a deficient number, since it is larger than the sum of its proper divisors (66959097).

171117447 is a wasteful number, since it uses less digits than its factorization.

171117447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479989.

The product of its digits is 5488, while the sum is 33.

The square root of 171117447 is about 13081.1867580889. The cubic root of 171117447 is about 555.1769551801.

The spelling of 171117447 in words is "one hundred seventy-one million, one hundred seventeen thousand, four hundred forty-seven".