995809 has 8 divisors (see below), whose sum is σ = 1110240. Its totient is φ = 887616.

The previous prime is 995801. The next prime is 995833. The reversal of 995809 is 908599.

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 995809 - 2³ = 995801 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (995801) 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, 1219 + ... + 1864.

It is an arithmetic number, because the mean of its divisors is an integer number (138780).

2⁹⁹⁵⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

995809 is a deficient number, since it is larger than the sum of its proper divisors (114431).

995809 is a wasteful number, since it uses less digits than its factorization.

995809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119.

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

The square root of 995809 is about 997.9022998270. The cubic root of 995809 is about 99.8601043834.

The spelling of 995809 in words is "nine hundred ninety-five thousand, eight hundred nine".