808804805 has 4 divisors (see below), whose sum is σ = 970565772. Its totient is φ = 647043840.

The previous prime is 808804783. The next prime is 808804819. The reversal of 808804805 is 508408808.

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 470759809 + 338044996 = 21697^2 + 18386^2 .

It is not a de Polignac number, because 808804805 - 2¹² = 808800709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 80880476 + ... + 80880485.

It is an arithmetic number, because the mean of its divisors is an integer number (242641443).

Almost surely, 2^808804805 is an apocalyptic number.

It is an amenable number.

808804805 is a deficient number, since it is larger than the sum of its proper divisors (161760967).

808804805 is a wasteful number, since it uses less digits than its factorization.

808804805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161760966.

The product of its (nonzero) digits is 81920, while the sum is 41.

The square root of 808804805 is about 28439.4937542847. The cubic root of 808804805 is about 931.7110385935.

The spelling of 808804805 in words is "eight hundred eight million, eight hundred four thousand, eight hundred five".