8391171 has 4 divisors (see below), whose sum is σ = 11188232. Its totient is φ = 5594112.

The previous prime is 8391151. The next prime is 8391197. The reversal of 8391171 is 1711938.

8391171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8391171 - 2¹¹ = 8389123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8391151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398526 + ... + 1398531.

It is an arithmetic number, because the mean of its divisors is an integer number (2797058).

Almost surely, 2^8391171 is an apocalyptic number.

8391171 is a deficient number, since it is larger than the sum of its proper divisors (2797061).

8391171 is a wasteful number, since it uses less digits than its factorization.

8391171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797060.

The product of its digits is 1512, while the sum is 30.

The square root of 8391171 is about 2896.7518015874. The cubic root of 8391171 is about 203.2080260511.

The spelling of 8391171 in words is "eight million, three hundred ninety-one thousand, one hundred seventy-one".