391171 has 8 divisors (see below), whose sum is σ = 437184. Its totient is φ = 346920.

The previous prime is 391163. The next prime is 391177. The reversal of 391171 is 171193.

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 391171 - 2³ = 391163 is a prime.

It is a pancake number, because a pancake can be divided into 391171 parts by 884 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (391177) 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, 60 + ... + 886.

It is an arithmetic number, because the mean of its divisors is an integer number (54648).

2³⁹¹¹⁷¹ is an apocalyptic number.

391171 is a deficient number, since it is larger than the sum of its proper divisors (46013).

391171 is a wasteful number, since it uses less digits than its factorization.

391171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its digits is 189, while the sum is 22.

The square root of 391171 is about 625.4366474712. The cubic root of 391171 is about 73.1344865575.

Adding to 391171 its sum of digits (22), we get a palindrome (391193).

The spelling of 391171 in words is "three hundred ninety-one thousand, one hundred seventy-one".