809995 has 4 divisors (see below), whose sum is σ = 972000. Its totient is φ = 647992.

The previous prime is 809993. The next prime is 810013. The reversal of 809995 is 599908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 809995 - 2¹ = 809993 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (809993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80995 + ... + 81004.

It is an arithmetic number, because the mean of its divisors is an integer number (243000).

2⁸⁰⁹⁹⁹⁵ is an apocalyptic number.

809995 is a deficient number, since it is larger than the sum of its proper divisors (162005).

809995 is a wasteful number, since it uses less digits than its factorization.

809995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162004.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 809995 is about 899.9972222179. The cubic root of 809995 is about 93.2167833737.

The spelling of 809995 in words is "eight hundred nine thousand, nine hundred ninety-five".