163995 has 24 divisors (see below), whose sum is σ = 292656. Its totient is φ = 77952.

The previous prime is 163993. The next prime is 163997. The reversal of 163995 is 599361.

It is an interprime number because it is at equal distance from previous prime (163993) and next prime (163997).

It is not a de Polignac number, because 163995 - 2¹ = 163993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163991) 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 23 ways as a sum of consecutive naturals, for example, 5641 + ... + 5669.

It is an arithmetic number, because the mean of its divisors is an integer number (12194).

2¹⁶³⁹⁹⁵ is an apocalyptic number.

163995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163995 is a deficient number, since it is larger than the sum of its proper divisors (128661).

163995 is a wasteful number, since it uses less digits than its factorization.

163995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 50 counting only the distinct ones).

The product of its digits is 7290, while the sum is 33.

The square root of 163995 is about 404.9629612693. The cubic root of 163995 is about 54.7364804716.

The spelling of 163995 in words is "one hundred sixty-three thousand, nine hundred ninety-five".