9001089 has 6 divisors (see below), whose sum is σ = 13001586. Its totient is φ = 6000720.

The previous prime is 9001063. The next prime is 9001093. The reversal of 9001089 is 9801009.

It can be written as a sum of positive squares in only one way, i.e., 9000000 + 1089 = 3000^2 + 33^2 .

It is not a de Polignac number, because 9001089 - 2⁷ = 9000961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9001039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500052 + ... + 500069.

It is an arithmetic number, because the mean of its divisors is an integer number (2166931).

Almost surely, 2^9001089 is an apocalyptic number.

It is an amenable number.

9001089 is a deficient number, since it is larger than the sum of its proper divisors (4000497).

9001089 is a wasteful number, since it uses less digits than its factorization.

9001089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000127 (or 1000124 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 9001089 is about 3000.1814945100. The cubic root of 9001089 is about 208.0167716382.

It can be divided in two parts, 900 and 1089, that multiplied together give a square (980100 = 990²).

The spelling of 9001089 in words is "nine million, one thousand, eighty-nine".