9109491 has 4 divisors (see below), whose sum is σ = 12145992. Its totient is φ = 6072992.

The previous prime is 9109483. The next prime is 9109519. The reversal of 9109491 is 1949019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9109491 - 2³ = 9109483 is a prime.

9109491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9109591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518246 + ... + 1518251.

It is an arithmetic number, because the mean of its divisors is an integer number (3036498).

Almost surely, 2^9109491 is an apocalyptic number.

9109491 is a deficient number, since it is larger than the sum of its proper divisors (3036501).

9109491 is a wasteful number, since it uses less digits than its factorization.

9109491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036500.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 9109491 is about 3018.1933337677. The cubic root of 9109491 is about 208.8485047910.

It can be divided in two parts, 910 and 9491, that added together give a palindrome (10401).

The spelling of 9109491 in words is "nine million, one hundred nine thousand, four hundred ninety-one".