9813091 has 4 divisors (see below), whose sum is σ = 9820000. Its totient is φ = 9806184.

The previous prime is 9813061. The next prime is 9813127. The reversal of 9813091 is 1903189.

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: 1903189 = 79 ⋅24091.

It is a cyclic number.

It is not a de Polignac number, because 9813091 - 2⁷ = 9812963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9813061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456 + ... + 4453.

It is an arithmetic number, because the mean of its divisors is an integer number (2455000).

Almost surely, 2^9813091 is an apocalyptic number.

9813091 is a deficient number, since it is larger than the sum of its proper divisors (6909).

9813091 is a wasteful number, since it uses less digits than its factorization.

9813091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 9813091 is about 3132.5853539848. The cubic root of 9813091 is about 214.0927408322.

The spelling of 9813091 in words is "nine million, eight hundred thirteen thousand, ninety-one".