808205 has 4 divisors (see below), whose sum is σ = 969852. Its totient is φ = 646560.

The previous prime is 808187. The next prime is 808211. The reversal of 808205 is 502808.

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 292681 + 515524 = 541^2 + 718^2 .

It is not a de Polignac number, because 808205 - 2⁸ = 807949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80816 + ... + 80825.

It is an arithmetic number, because the mean of its divisors is an integer number (242463).

2⁸⁰⁸²⁰⁵ is an apocalyptic number.

It is an amenable number.

808205 is a deficient number, since it is larger than the sum of its proper divisors (161647).

808205 is a wasteful number, since it uses less digits than its factorization.

808205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161646.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 808205 is about 899.0022246914. The cubic root of 808205 is about 93.1480664450.

The spelling of 808205 in words is "eight hundred eight thousand, two hundred five".