204836009 has 16 divisors (see below), whose sum is σ = 248347008. Its totient is φ = 164927232.

The previous prime is 204835993. The next prime is 204836039. The reversal of 204836009 is 900638402.

It is a cyclic number.

It is not a de Polignac number, because 204836009 - 2⁴ = 204835993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204836039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75179 + ... + 77855.

It is an arithmetic number, because the mean of its divisors is an integer number (15521688).

Almost surely, 2^204836009 is an apocalyptic number.

It is an amenable number.

204836009 is a deficient number, since it is larger than the sum of its proper divisors (43510999).

204836009 is a wasteful number, since it uses less digits than its factorization.

204836009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 204836009 is about 14312.0931033864. The cubic root of 204836009 is about 589.4795841877.

The spelling of 204836009 in words is "two hundred four million, eight hundred thirty-six thousand, nine".