204433989 has 8 divisors (see below), whose sum is σ = 272960640. Its totient is φ = 136098336.

The previous prime is 204433987. The next prime is 204434017. The reversal of 204433989 is 989334402.

It is a happy number.

204433989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 204433989 - 2¹ = 204433987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204433989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204433981) 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, 45232 + ... + 49545.

It is an arithmetic number, because the mean of its divisors is an integer number (34120080).

Almost surely, 2^204433989 is an apocalyptic number.

It is an amenable number.

204433989 is a deficient number, since it is larger than the sum of its proper divisors (68526651).

204433989 is an equidigital number, since it uses as much as digits as its factorization.

204433989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95499.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 204433989 is about 14298.0414393021. The cubic root of 204433989 is about 589.0936855847.

The spelling of 204433989 in words is "two hundred four million, four hundred thirty-three thousand, nine hundred eighty-nine".