204135663 has 8 divisors (see below), whose sum is σ = 278510848. Its totient is φ = 132925464.

The previous prime is 204135653. The next prime is 204135683. The reversal of 204135663 is 366531402.

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

It is not a de Polignac number, because 204135663 - 2⁴ = 204135647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204135663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204135653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791095 + ... + 791352.

It is an arithmetic number, because the mean of its divisors is an integer number (34813856).

Almost surely, 2^204135663 is an apocalyptic number.

204135663 is a deficient number, since it is larger than the sum of its proper divisors (74375185).

204135663 is a wasteful number, since it uses less digits than its factorization.

204135663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582493.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 204135663 is about 14287.6052227096. The cubic root of 204135663 is about 588.8069956227.

The spelling of 204135663 in words is "two hundred four million, one hundred thirty-five thousand, six hundred sixty-three".