205279 has 4 divisors (see below), whose sum is σ = 207376. Its totient is φ = 203184.

The previous prime is 205267. The next prime is 205297. The reversal of 205279 is 972502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205279 - 2⁷ = 205151 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205879) 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, 894 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (51844).

2²⁰⁵²⁷⁹ is an apocalyptic number.

205279 is a deficient number, since it is larger than the sum of its proper divisors (2097).

205279 is a wasteful number, since it uses less digits than its factorization.

205279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 205279 is about 453.0772561054. The cubic root of 205279 is about 58.9904226530.

It can be divided in two parts, 205 and 279, that added together give a palindrome (484).

The spelling of 205279 in words is "two hundred five thousand, two hundred seventy-nine".