2004123609 has 24 divisors (see below), whose sum is σ = 2953184832. Its totient is φ = 1309220640.

The previous prime is 2004123599. The next prime is 2004123673. The reversal of 2004123609 is 9063214002.

It is not a de Polignac number, because 2004123609 - 2⁷ = 2004123481 is a prime.

It is a super-2 number, since 2×2004123609² = 8033022880302369762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2004123109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461004 + ... + 465330.

It is an arithmetic number, because the mean of its divisors is an integer number (123049368).

Almost surely, 2^2004123609 is an apocalyptic number.

It is an amenable number.

2004123609 is a deficient number, since it is larger than the sum of its proper divisors (949061223).

2004123609 is a wasteful number, since it uses less digits than its factorization.

2004123609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2004123609 is about 44767.4391606221. The cubic root of 2004123609 is about 1260.7863590977.

The spelling of 2004123609 in words is "two billion, four million, one hundred twenty-three thousand, six hundred nine".