204504989 has 8 divisors (see below), whose sum is σ = 220822560. Its totient is φ = 188271216.

The previous prime is 204504967. The next prime is 204504991. The reversal of 204504989 is 989405402.

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 204504989 - 2²⁴ = 187727773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204504929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15827 + ... + 25680.

It is an arithmetic number, because the mean of its divisors is an integer number (27602820).

Almost surely, 2^204504989 is an apocalyptic number.

It is an amenable number.

204504989 is a deficient number, since it is larger than the sum of its proper divisors (16317571).

204504989 is a wasteful number, since it uses less digits than its factorization.

204504989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41899.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 204504989 is about 14300.5240813056. The cubic root of 204504989 is about 589.1618751762.

The spelling of 204504989 in words is "two hundred four million, five hundred four thousand, nine hundred eighty-nine".