204090447 has 8 divisors (see below), whose sum is σ = 296858880. Its totient is φ = 123691160.

The previous prime is 204090437. The next prime is 204090461. The reversal of 204090447 is 744090402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204090447 - 2²⁰ = 203041871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204090437) 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 7 ways as a sum of consecutive naturals, for example, 3092247 + ... + 3092312.

It is an arithmetic number, because the mean of its divisors is an integer number (37107360).

Almost surely, 2^204090447 is an apocalyptic number.

204090447 is a deficient number, since it is larger than the sum of its proper divisors (92768433).

204090447 is a wasteful number, since it uses less digits than its factorization.

204090447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184573.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 204090447 is about 14286.0227845261. The cubic root of 204090447 is about 588.7635188767.

The spelling of 204090447 in words is "two hundred four million, ninety thousand, four hundred forty-seven".