204517429 has 4 divisors (see below), whose sum is σ = 216547884. Its totient is φ = 192486976.

The previous prime is 204517421. The next prime is 204517441. The reversal of 204517429 is 924715402.

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 55726225 + 148791204 = 7465^2 + 12198^2 .

It is a cyclic number.

It is not a de Polignac number, because 204517429 - 2³ = 204517421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204517394 and 204517403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204517421) 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 in 3 ways as a sum of consecutive naturals, for example, 6015202 + ... + 6015235.

It is an arithmetic number, because the mean of its divisors is an integer number (54136971).

Almost surely, 2^204517429 is an apocalyptic number.

It is an amenable number.

204517429 is a deficient number, since it is larger than the sum of its proper divisors (12030455).

204517429 is a wasteful number, since it uses less digits than its factorization.

204517429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030454.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 204517429 is about 14300.9590237858. The cubic root of 204517429 is about 589.1738211360.

The spelling of 204517429 in words is "two hundred four million, five hundred seventeen thousand, four hundred twenty-nine".