205469 has 4 divisors (see below), whose sum is σ = 224160. Its totient is φ = 186780.

The previous prime is 205463. The next prime is 205477. The reversal of 205469 is 964502.

205469 is nontrivially palindromic in base 14.

205469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205469 - 2⁴ = 205453 is a prime.

It is a super-2 number, since 2×205469² = 84435019922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 205469.

It is not an unprimeable number, because it can be changed into a prime (205463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9329 + ... + 9350.

It is an arithmetic number, because the mean of its divisors is an integer number (56040).

2²⁰⁵⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

205469 is a deficient number, since it is larger than the sum of its proper divisors (18691).

205469 is a wasteful number, since it uses less digits than its factorization.

205469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18690.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 205469 is about 453.2868848754. The cubic root of 205469 is about 59.0086169546.

The spelling of 205469 in words is "two hundred five thousand, four hundred sixty-nine".