9916191 has 12 divisors (see below), whose sum is σ = 14355432. Its totient is φ = 6596016.

The previous prime is 9916183. The next prime is 9916199. The reversal of 9916191 is 1916199.

It is an interprime number because it is at equal distance from previous prime (9916183) and next prime (9916199).

It is not a de Polignac number, because 9916191 - 2³ = 9916183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9916199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4345 + ... + 6221.

It is an arithmetic number, because the mean of its divisors is an integer number (1196286).

Almost surely, 2^9916191 is an apocalyptic number.

9916191 is a deficient number, since it is larger than the sum of its proper divisors (4439241).

9916191 is a wasteful number, since it uses less digits than its factorization.

9916191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 2467 counting only the distinct ones).

The product of its digits is 4374, while the sum is 36.

The square root of 9916191 is about 3148.9984121939. The cubic root of 9916191 is about 214.8399096698.

It can be divided in two parts, 99 and 16191, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 9916191 in words is "nine million, nine hundred sixteen thousand, one hundred ninety-one".