204470209 has 2 divisors, whose sum is σ = 204470210. Its totient is φ = 204470208.

The previous prime is 204470197. The next prime is 204470221. The reversal of 204470209 is 902074402.

It is a balanced prime because it is at equal distance from previous prime (204470197) and next prime (204470221).

It can be written as a sum of positive squares in only one way, i.e., 160579584 + 43890625 = 12672^2 + 6625^2 .

It is a cyclic number.

It is not a de Polignac number, because 204470209 - 2⁷ = 204470081 is a prime.

It is not a weakly prime, because it can be changed into another prime (204470309) 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 as a sum of consecutive naturals, namely, 102235104 + 102235105.

It is an arithmetic number, because the mean of its divisors is an integer number (102235105).

Almost surely, 2^204470209 is an apocalyptic number.

It is an amenable number.

204470209 is a deficient number, since it is larger than the sum of its proper divisors (1).

204470209 is an equidigital number, since it uses as much as digits as its factorization.

204470209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 204470209 is about 14299.3079902490. The cubic root of 204470209 is about 589.1284738529.

The spelling of 204470209 in words is "two hundred four million, four hundred seventy thousand, two hundred nine".