8712191 has 4 divisors (see below), whose sum is σ = 8720472. Its totient is φ = 8703912.

The previous prime is 8712181. The next prime is 8712227. The reversal of 8712191 is 1912178.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8712191 - 2¹⁴ = 8695807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8712181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (2180118).

Almost surely, 2^8712191 is an apocalyptic number.

8712191 is a deficient number, since it is larger than the sum of its proper divisors (8281).

8712191 is a wasteful number, since it uses less digits than its factorization.

8712191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280.

The product of its digits is 1008, while the sum is 29.

The square root of 8712191 is about 2951.6420853484. The cubic root of 8712191 is about 205.7670332707.

The spelling of 8712191 in words is "eight million, seven hundred twelve thousand, one hundred ninety-one".