805000091 has 8 divisors (see below), whose sum is σ = 920677344. Its totient is φ = 689492160.

The previous prime is 805000087. The next prime is 805000111. The reversal of 805000091 is 190000508.

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

It is not a de Polignac number, because 805000091 - 2² = 805000087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805000891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31970 + ... + 51303.

It is an arithmetic number, because the mean of its divisors is an integer number (115084668).

Almost surely, 2^805000091 is an apocalyptic number.

805000091 is a deficient number, since it is larger than the sum of its proper divisors (115677253).

805000091 is a wasteful number, since it uses less digits than its factorization.

805000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84661.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 805000091 is about 28372.5235218865. The cubic root of 805000091 is about 930.2477818978.

Adding to 805000091 its reverse (190000508), we get a palindrome (995000599).

The spelling of 805000091 in words is "eight hundred five million, ninety-one", and thus it is an aban number.