233985009 has 4 divisors (see below), whose sum is σ = 311980016. Its totient is φ = 155990004.

The previous prime is 233985007. The next prime is 233985013. The reversal of 233985009 is 900589332.

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.

It is not a de Polignac number, because 233985009 - 2¹ = 233985007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233985007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38997499 + ... + 38997504.

It is an arithmetic number, because the mean of its divisors is an integer number (77995004).

Almost surely, 2^233985009 is an apocalyptic number.

It is an amenable number.

233985009 is a deficient number, since it is larger than the sum of its proper divisors (77995007).

233985009 is an equidigital number, since it uses as much as digits as its factorization.

233985009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77995006.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 233985009 is about 15296.5685367667. The cubic root of 233985009 is about 616.2108552144.

The spelling of 233985009 in words is "two hundred thirty-three million, nine hundred eighty-five thousand, nine".