9201091 has 4 divisors (see below), whose sum is σ = 9518400. Its totient is φ = 8883784.

The previous prime is 9201089. The next prime is 9201113. The reversal of 9201091 is 1901029.

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 9201091 - 2¹ = 9201089 is a prime.

It is a Duffinian number.

9201091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9201041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158611 + ... + 158668.

It is an arithmetic number, because the mean of its divisors is an integer number (2379600).

Almost surely, 2^9201091 is an apocalyptic number.

9201091 is a deficient number, since it is larger than the sum of its proper divisors (317309).

9201091 is a wasteful number, since it uses less digits than its factorization.

9201091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317308.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 9201091 is about 3033.3300183132. The cubic root of 9201091 is about 209.5461931280.

The spelling of 9201091 in words is "nine million, two hundred one thousand, ninety-one".