995 has 4 divisors (see below), whose sum is σ = 1200. Its totient is φ = 792.
The previous prime is 991. The next prime is 997. The reversal of 995 is 599.
995 is nontrivially palindromic in base 16.
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 995 - 22 = 991 is a prime.
995 is an undulating number in base 16.
It is a plaindrome in base 12.
It is a nialpdrome in base 10 and base 14.
It is a zygodrome in base 2.
It is a self number, because there is not a number n which added to its sum of digits gives 995.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (991) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95 + ... + 104.
It is an arithmetic number, because the mean of its divisors is an integer number (300).
995 is a deficient number, since it is larger than the sum of its proper divisors (205).
995 is a wasteful number, since it uses less digits than its factorization.
995 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 digits is 405, while the sum is 23.
The square root of 995 is about 31.5436205912. The cubic root of 995 is about 9.9833054781.
The spelling of 995 in words is "nine hundred ninety-five", and thus it is an aban number and an oban number.
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