204916289 has 4 divisors (see below), whose sum is σ = 205615956. Its totient is φ = 204216624.

The previous prime is 204916279. The next prime is 204916303. The reversal of 204916289 is 982619402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173185600 + 31730689 = 13160^2 + 5633^2 .

It is a cyclic number.

It is not a de Polignac number, because 204916289 - 2¹² = 204912193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204916259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349394 + ... + 349979.

It is an arithmetic number, because the mean of its divisors is an integer number (51403989).

Almost surely, 2^204916289 is an apocalyptic number.

It is an amenable number.

204916289 is a deficient number, since it is larger than the sum of its proper divisors (699667).

204916289 is an equidigital number, since it uses as much as digits as its factorization.

204916289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699666.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 204916289 is about 14314.8974498597. The cubic root of 204916289 is about 589.5565843861.

The spelling of 204916289 in words is "two hundred four million, nine hundred sixteen thousand, two hundred eighty-nine".