9116991 has 24 divisors (see below), whose sum is σ = 14676480. Its totient is φ = 5414976.

The previous prime is 9116983. The next prime is 9117011. The reversal of 9116991 is 1996119.

It is not a de Polignac number, because 9116991 - 2³ = 9116983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9116951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2050 + ... + 4736.

It is an arithmetic number, because the mean of its divisors is an integer number (611520).

Almost surely, 2^9116991 is an apocalyptic number.

9116991 is a deficient number, since it is larger than the sum of its proper divisors (5559489).

9116991 is a wasteful number, since it uses less digits than its factorization.

9116991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2732 counting only the distinct ones).

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

The square root of 9116991 is about 3019.4355432763. The cubic root of 9116991 is about 208.9058052524.

The spelling of 9116991 in words is "nine million, one hundred sixteen thousand, nine hundred ninety-one".