9170891 has 4 divisors (see below), whose sum is σ = 9177000. Its totient is φ = 9164784.

The previous prime is 9170881. The next prime is 9170899. The reversal of 9170891 is 1980719.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1980719 = 13 ⋅152363.

It is a cyclic number.

It is not a de Polignac number, because 9170891 - 2¹⁴ = 9154507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9170899) 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, 935 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (2294250).

Almost surely, 2^9170891 is an apocalyptic number.

9170891 is a deficient number, since it is larger than the sum of its proper divisors (6109).

9170891 is a wasteful number, since it uses less digits than its factorization.

9170891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 9170891 is about 3028.3478994330. The cubic root of 9170891 is about 209.3166829788.

The spelling of 9170891 in words is "nine million, one hundred seventy thousand, eight hundred ninety-one".