204929 has 4 divisors (see below), whose sum is σ = 207060. Its totient is φ = 202800.

The previous prime is 204923. The next prime is 204931. The reversal of 204929 is 929402.

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 200704 + 4225 = 448^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 204929 - 2⁴ = 204913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204898 and 204907.

It is not an unprimeable number, because it can be changed into a prime (204923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (51765).

2²⁰⁴⁹²⁹ is an apocalyptic number.

It is an amenable number.

204929 is a deficient number, since it is larger than the sum of its proper divisors (2131).

204929 is a wasteful number, since it uses less digits than its factorization.

204929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 204929 is about 452.6908437333. The cubic root of 204929 is about 58.9568774240.

The spelling of 204929 in words is "two hundred four thousand, nine hundred twenty-nine".