204057909 has 36 divisors (see below), whose sum is σ = 338109408. Its totient is φ = 118279920.

The previous prime is 204057901. The next prime is 204057911. The reversal of 204057909 is 909750402.

204057909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204057909 - 2³ = 204057901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204057901) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20974 + ... + 29120.

It is an arithmetic number, because the mean of its divisors is an integer number (9391928).

Almost surely, 2^204057909 is an apocalyptic number.

It is an amenable number.

204057909 is a deficient number, since it is larger than the sum of its proper divisors (134051499).

204057909 is a wasteful number, since it uses less digits than its factorization.

204057909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198 (or 8184 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 204057909 is about 14284.8839337252. The cubic root of 204057909 is about 588.7322284925.

The spelling of 204057909 in words is "two hundred four million, fifty-seven thousand, nine hundred nine".