9005590921 has 8 divisors (see below), whose sum is σ = 9216323424. Its totient is φ = 8794917600.

The previous prime is 9005590889. The next prime is 9005590927. The reversal of 9005590921 is 1290955009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9005590921 - 2⁵ = 9005590889 is a prime.

It is a super-2 number, since 2×9005590921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9005590927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498570 + ... + 516316.

It is an arithmetic number, because the mean of its divisors is an integer number (1152040428).

Almost surely, 2^9005590921 is an apocalyptic number.

It is an amenable number.

9005590921 is a deficient number, since it is larger than the sum of its proper divisors (210732503).

9005590921 is a wasteful number, since it uses less digits than its factorization.

9005590921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29591.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 9005590921 is about 94897.7919711518. The cubic root of 9005590921 is about 2080.5144592374.

The spelling of 9005590921 in words is "nine billion, five million, five hundred ninety thousand, nine hundred twenty-one".