800091 has 8 divisors (see below), whose sum is σ = 1185360. Its totient is φ = 533376.

The previous prime is 800089. The next prime is 800113. The reversal of 800091 is 190008.

It is not a de Polignac number, because 800091 - 2¹ = 800089 is a prime.

800091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (800011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14790 + ... + 14843.

It is an arithmetic number, because the mean of its divisors is an integer number (148170).

2⁸⁰⁰⁰⁹¹ is an apocalyptic number.

800091 is a deficient number, since it is larger than the sum of its proper divisors (385269).

800091 is a wasteful number, since it uses less digits than its factorization.

800091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29642 (or 29636 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 800091 is about 894.4780600999. The cubic root of 800091 is about 92.8352964103.

Adding to 800091 its reverse (190008), we get a palindrome (990099).

The spelling of 800091 in words is "eight hundred thousand, ninety-one".