995999 has 12 divisors (see below), whose sum is σ = 1097280. Its totient is φ = 902880.

The previous prime is 995989. The next prime is 996001. The reversal of 995999 is 999599.

It is not a de Polignac number, because 995999 - 2⁴ = 995983 is a prime.

It is a Duffinian number.

995999 is a modest number, since divided by 999 gives 995 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (995909) 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 11 ways as a sum of consecutive naturals, for example, 11147 + ... + 11235.

It is an arithmetic number, because the mean of its divisors is an integer number (91440).

2⁹⁹⁵⁹⁹⁹ is an apocalyptic number.

995999 is a deficient number, since it is larger than the sum of its proper divisors (101281).

995999 is a wasteful number, since it uses less digits than its factorization.

995999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 139 counting only the distinct ones).

The product of its digits is 295245, while the sum is 50.

The square root of 995999 is about 997.9974949868. The cubic root of 995999 is about 99.8664550702.

Subtracting 995999 from its reverse (999599), we obtain a square (3600 = 60²).

The spelling of 995999 in words is "nine hundred ninety-five thousand, nine hundred ninety-nine".