33009 has 4 divisors (see below), whose sum is σ = 44016.
Its totient is φ = 22004.
The previous prime is 32999. The next prime is 33013. The reversal of 33009 is 90033.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90033 = 3 ⋅30011.
It is a cyclic number.
It is not a de Polignac number, because 33009 - 24 = 32993 is a prime.
It is a D-number.
It is a plaindrome in base 11.
It is not an unprimeable number, because it can be changed into a prime (33029) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5499 + ... + 5504.
It is an arithmetic number, because the mean of its divisors is an integer number (11004).
233009 is an apocalyptic number.
It is an amenable number.
33009 is a deficient number, since it is larger than the sum of its proper divisors (11007).
33009 is a wasteful number, since it uses less digits than its factorization.
33009 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11006.
The product of its (nonzero) digits is 81, while the sum is 15.
The square root of 33009 is about 181.6837912418.
The cubic root of 33009 is about 32.0782589752.
The spelling of 33009 in words is "thirty-three thousand, nine".