8916191 has 2 divisors, whose sum is σ = 8916192. Its totient is φ = 8916190.

The previous prime is 8916181. The next prime is 8916197. The reversal of 8916191 is 1916198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8916191 - 2¹⁰ = 8915167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8916197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4458095 + 4458096.

It is an arithmetic number, because the mean of its divisors is an integer number (4458096).

Almost surely, 2^8916191 is an apocalyptic number.

8916191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8916191 is an equidigital number, since it uses as much as digits as its factorization.

8916191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 35.

The square root of 8916191 is about 2985.9991627594. Note that the first 3 decimals coincide. The cubic root of 8916191 is about 207.3607019790.

It can be divided in two parts, 891 and 6191, that multiplied together give a triangular number (5516181 = T₃₃₂₁).

The spelling of 8916191 in words is "eight million, nine hundred sixteen thousand, one hundred ninety-one".