205598849 has 4 divisors (see below), whose sum is σ = 206181636. Its totient is φ = 205016064.

The previous prime is 205598839. The next prime is 205598857. The reversal of 205598849 is 948895502.

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 26708224 + 178890625 = 5168^2 + 13375^2 .

It is a cyclic number.

It is not a de Polignac number, because 205598849 - 2⁸ = 205598593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205598797 and 205598806.

It is not an unprimeable number, because it can be changed into a prime (205598839) 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, 290864 + ... + 291569.

It is an arithmetic number, because the mean of its divisors is an integer number (51545409).

Almost surely, 2^205598849 is an apocalyptic number.

It is an amenable number.

205598849 is a deficient number, since it is larger than the sum of its proper divisors (582787).

205598849 is an equidigital number, since it uses as much as digits as its factorization.

205598849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582786.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The square root of 205598849 is about 14338.7185271209. The cubic root of 205598849 is about 590.2104477645.

The spelling of 205598849 in words is "two hundred five million, five hundred ninety-eight thousand, eight hundred forty-nine".