204120361 has 2 divisors, whose sum is σ = 204120362. Its totient is φ = 204120360.

The previous prime is 204120347. The next prime is 204120383. The reversal of 204120361 is 163021402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172265625 + 31854736 = 13125^2 + 5644^2 .

It is a cyclic number.

It is not a de Polignac number, because 204120361 - 2²¹ = 202023209 is a prime.

It is not a weakly prime, because it can be changed into another prime (204120061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060180 + 102060181.

It is an arithmetic number, because the mean of its divisors is an integer number (102060181).

Almost surely, 2^204120361 is an apocalyptic number.

It is an amenable number.

204120361 is a deficient number, since it is larger than the sum of its proper divisors (1).

204120361 is an equidigital number, since it uses as much as digits as its factorization.

204120361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 204120361 is about 14287.0697135557. The cubic root of 204120361 is about 588.7922829398.

Adding to 204120361 its reverse (163021402), we get a palindrome (367141763).

The spelling of 204120361 in words is "two hundred four million, one hundred twenty thousand, three hundred sixty-one".