205879049 has 4 divisors (see below), whose sum is σ = 214830336. Its totient is φ = 196927764.

The previous prime is 205879043. The next prime is 205879067. The reversal of 205879049 is 940978502.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 205879049 - 2¹⁶ = 205813513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205879043) 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 3 ways as a sum of consecutive naturals, for example, 4475609 + ... + 4475654.

It is an arithmetic number, because the mean of its divisors is an integer number (53707584).

Almost surely, 2^205879049 is an apocalyptic number.

It is an amenable number.

205879049 is a deficient number, since it is larger than the sum of its proper divisors (8951287).

205879049 is an equidigital number, since it uses as much as digits as its factorization.

205879049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8951286.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 205879049 is about 14348.4859480016. The cubic root of 205879049 is about 590.4784484484.

The spelling of 205879049 in words is "two hundred five million, eight hundred seventy-nine thousand, forty-nine".