204669 has 6 divisors (see below), whose sum is σ = 295646. Its totient is φ = 136440.

The previous prime is 204667. The next prime is 204679. The reversal of 204669 is 966402.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 72900 = 363^2 + 270^2 .

It is not a de Polignac number, because 204669 - 2¹ = 204667 is a prime.

It is a super-2 number, since 2×204669² = 83778799122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204667) 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 in 5 ways as a sum of consecutive naturals, for example, 11362 + ... + 11379.

2²⁰⁴⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

204669 is a deficient number, since it is larger than the sum of its proper divisors (90977).

204669 is a wasteful number, since it uses less digits than its factorization.

204669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22747 (or 22744 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 204669 is about 452.4035808877. The cubic root of 204669 is about 58.9319333777.

The spelling of 204669 in words is "two hundred four thousand, six hundred sixty-nine".