800191 has 8 divisors (see below), whose sum is σ = 926720. Its totient is φ = 676728.

The previous prime is 800171. The next prime is 800209. The reversal of 800191 is 191008.

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 800191 - 2⁵ = 800159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800131) 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, 171 + ... + 1276.

It is an arithmetic number, because the mean of its divisors is an integer number (115840).

2⁸⁰⁰¹⁹¹ is an apocalyptic number.

800191 is a deficient number, since it is larger than the sum of its proper divisors (126529).

800191 is a wasteful number, since it uses less digits than its factorization.

800191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 800191 is about 894.5339568736. The cubic root of 800191 is about 92.8391639466.

Adding to 800191 its reverse (191008), we get a palindrome (991199).

The spelling of 800191 in words is "eight hundred thousand, one hundred ninety-one".