9166991 has 4 divisors (see below), whose sum is σ = 9176472. Its totient is φ = 9157512.

The previous prime is 9166981. The next prime is 9167003. The reversal of 9166991 is 1996619.

9166991 is digitally balanced in base 2, 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9166991 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 (9166931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3101 + ... + 5286.

It is an arithmetic number, because the mean of its divisors is an integer number (2294118).

Almost surely, 2^9166991 is an apocalyptic number.

9166991 is a deficient number, since it is larger than the sum of its proper divisors (9481).

9166991 is a wasteful number, since it uses less digits than its factorization.

9166991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9480.

The product of its digits is 26244, while the sum is 41.

The square root of 9166991 is about 3027.7039155109. The cubic root of 9166991 is about 209.2870075340.

The spelling of 9166991 in words is "nine million, one hundred sixty-six thousand, nine hundred ninety-one".