9021091 has 4 divisors (see below), whose sum is σ = 9028800. Its totient is φ = 9013384.

The previous prime is 9021071. The next prime is 9021113. The reversal of 9021091 is 1901209.

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.

It is a cyclic number.

It is not a de Polignac number, because 9021091 - 2²³ = 632483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9021071) 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, 1696 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (2257200).

Almost surely, 2^9021091 is an apocalyptic number.

9021091 is a deficient number, since it is larger than the sum of its proper divisors (7709).

9021091 is a wasteful number, since it uses less digits than its factorization.

9021091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7708.

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

The square root of 9021091 is about 3003.5131096767. The cubic root of 9021091 is about 208.1707409077.

The spelling of 9021091 in words is "nine million, twenty-one thousand, ninety-one".