209895 has 16 divisors (see below), whose sum is σ = 384000. Its totient is φ = 95904.

The previous prime is 209887. The next prime is 209917. The reversal of 209895 is 598902.

209895 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209895 - 2³ = 209887 is a prime.

It is a super-3 number, since 3×209895³ = 27741346333777125, which contains 333 as substring. Note that it is a super-d number also for d = 2.

209895 is strictly pandigital in base 7.

209895 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 209895.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895 + ... + 1104.

It is an arithmetic number, because the mean of its divisors is an integer number (24000).

2²⁰⁹⁸⁹⁵ is an apocalyptic number.

209895 is a deficient number, since it is larger than the sum of its proper divisors (174105).

209895 is a wasteful number, since it uses less digits than its factorization.

209895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 209895 is about 458.1429907791. The cubic root of 209895 is about 59.4293113395.

The spelling of 209895 in words is "two hundred nine thousand, eight hundred ninety-five".