204445429 has 2 divisors, whose sum is σ = 204445430. Its totient is φ = 204445428.

The previous prime is 204445427. The next prime is 204445457. The reversal of 204445429 is 924544402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190495204 + 13950225 = 13802^2 + 3735^2 .

It is a cyclic number.

It is not a de Polignac number, because 204445429 - 2¹ = 204445427 is a prime.

Together with 204445427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 204445394 and 204445403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204445427) 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, 102222714 + 102222715.

It is an arithmetic number, because the mean of its divisors is an integer number (102222715).

Almost surely, 2^204445429 is an apocalyptic number.

It is an amenable number.

204445429 is a deficient number, since it is larger than the sum of its proper divisors (1).

204445429 is an equidigital number, since it uses as much as digits as its factorization.

204445429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 204445429 is about 14298.4414884980. The cubic root of 204445429 is about 589.1046738196.

The spelling of 204445429 in words is "two hundred four million, four hundred forty-five thousand, four hundred twenty-nine".