9005999 has 8 divisors (see below), whose sum is σ = 9305280. Its totient is φ = 8711296.

The previous prime is 9005989. The next prime is 9006013. The reversal of 9005999 is 9995009.

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 9005999 - 2⁸ = 9005743 is a prime.

It is a super-2 number, since 2×9005999² = 162216035976002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9005989) 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, 3107 + ... + 5259.

It is an arithmetic number, because the mean of its divisors is an integer number (1163160).

Almost surely, 2^9005999 is an apocalyptic number.

9005999 is a deficient number, since it is larger than the sum of its proper divisors (299281).

9005999 is a wasteful number, since it uses less digits than its factorization.

9005999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289.

The product of its (nonzero) digits is 32805, while the sum is 41.

The square root of 9005999 is about 3000.9996667777. Note that the first 3 decimals coincide. The cubic root of 9005999 is about 208.0545884213.

The spelling of 9005999 in words is "nine million, five thousand, nine hundred ninety-nine".