201204809 has 24 divisors (see below), whose sum is σ = 234796320. Its totient is φ = 171694848.

The previous prime is 201204803. The next prime is 201204823. The reversal of 201204809 is 908402102.

It is a de Polignac number, because none of the positive numbers 2^k-201204809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201204803) 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, 168914 + ... + 170100.

It is an arithmetic number, because the mean of its divisors is an integer number (9783180).

Almost surely, 2^201204809 is an apocalyptic number.

It is an amenable number.

201204809 is a deficient number, since it is larger than the sum of its proper divisors (33591511).

201204809 is a wasteful number, since it uses less digits than its factorization.

201204809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 201204809 is about 14184.6680962228. The cubic root of 201204809 is about 585.9754917977.

The spelling of 201204809 in words is "two hundred one million, two hundred four thousand, eight hundred nine".