9189891 has 12 divisors (see below), whose sum is σ = 13304200. Its totient is φ = 6112800.

The previous prime is 9189871. The next prime is 9189893. The reversal of 9189891 is 1989819.

9189891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9189891 - 2⁶ = 9189827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9189893) 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, 4560 + ... + 6258.

Almost surely, 2^9189891 is an apocalyptic number.

9189891 is a deficient number, since it is larger than the sum of its proper divisors (4114309).

9189891 is a wasteful number, since it uses less digits than its factorization.

9189891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2303 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 9189891 is about 3031.4833003004. The cubic root of 9189891 is about 209.4611354514.

The spelling of 9189891 in words is "nine million, one hundred eighty-nine thousand, eight hundred ninety-one".