204782401 has 2 divisors, whose sum is σ = 204782402. Its totient is φ = 204782400.

The previous prime is 204782377. The next prime is 204782443. The reversal of 204782401 is 104287402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107661376 + 97121025 = 10376^2 + 9855^2 .

It is a cyclic number.

It is not a de Polignac number, because 204782401 - 2¹³ = 204774209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204782401.

It is not a weakly prime, because it can be changed into another prime (204782491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102391200 + 102391201.

It is an arithmetic number, because the mean of its divisors is an integer number (102391201).

Almost surely, 2^204782401 is an apocalyptic number.

It is an amenable number.

204782401 is a deficient number, since it is larger than the sum of its proper divisors (1).

204782401 is an equidigital number, since it uses as much as digits as its factorization.

204782401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 204782401 is about 14310.2201590332. The cubic root of 204782401 is about 589.4281551138.

It can be divided in two parts, 2047 and 82401, that added together give a palindrome (84448).

The spelling of 204782401 in words is "two hundred four million, seven hundred eighty-two thousand, four hundred one".