205798073 has 8 divisors (see below), whose sum is σ = 234665928. Its totient is φ = 178792704.

The previous prime is 205798069. The next prime is 205798093. The reversal of 205798073 is 370897502.

It can be written as a sum of positive squares in 4 ways, for example, as 80066704 + 125731369 = 8948^2 + 11213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205798073 - 2² = 205798069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205798073.

It is not an unprimeable number, because it can be changed into a prime (205798093) 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 7 ways as a sum of consecutive naturals, for example, 465386 + ... + 465827.

It is an arithmetic number, because the mean of its divisors is an integer number (29333241).

Almost surely, 2^205798073 is an apocalyptic number.

It is an amenable number.

205798073 is a deficient number, since it is larger than the sum of its proper divisors (28867855).

205798073 is a wasteful number, since it uses less digits than its factorization.

205798073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931243.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 205798073 is about 14345.6639093491. The cubic root of 205798073 is about 590.4010229677.

The spelling of 205798073 in words is "two hundred five million, seven hundred ninety-eight thousand, seventy-three".