800989 has 16 divisors (see below), whose sum is σ = 995328. Its totient is φ = 628992.

The previous prime is 800977. The next prime is 800993. The reversal of 800989 is 989008.

It is not a de Polignac number, because 800989 - 2⁷ = 800861 is a prime.

It is an Ulam number.

It is a Duffinian number.

800989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800909) 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 15 ways as a sum of consecutive naturals, for example, 6244 + ... + 6370.

It is an arithmetic number, because the mean of its divisors is an integer number (62208).

2⁸⁰⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

800989 is a deficient number, since it is larger than the sum of its proper divisors (194339).

800989 is a wasteful number, since it uses less digits than its factorization.

800989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 800989 is about 894.9798880422. The cubic root of 800989 is about 92.8700153470.

The spelling of 800989 in words is "eight hundred thousand, nine hundred eighty-nine".