204602989 has 4 divisors (see below), whose sum is σ = 204636160. Its totient is φ = 204569820.

The previous prime is 204602977. The next prime is 204603017. The reversal of 204602989 is 989206402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204602989 - 2⁹ = 204602477 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 (204602929) 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 3 ways as a sum of consecutive naturals, for example, 4299 + ... + 20680.

It is an arithmetic number, because the mean of its divisors is an integer number (51159040).

Almost surely, 2^204602989 is an apocalyptic number.

It is an amenable number.

204602989 is a deficient number, since it is larger than the sum of its proper divisors (33171).

204602989 is an equidigital number, since it uses as much as digits as its factorization.

204602989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33170.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 204602989 is about 14303.9501187609. The cubic root of 204602989 is about 589.2559700990.

The spelling of 204602989 in words is "two hundred four million, six hundred two thousand, nine hundred eighty-nine".