209385 has 40 divisors (see below), whose sum is σ = 418176. Its totient is φ = 99360.

The previous prime is 209381. The next prime is 209393. The reversal of 209385 is 583902.

It is not a de Polignac number, because 209385 - 2² = 209381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209381) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4432 + ... + 4478.

2²⁰⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

209385 is a deficient number, since it is larger than the sum of its proper divisors (208791).

209385 is a wasteful number, since it uses less digits than its factorization.

209385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 209385 is about 457.5860574799. The cubic root of 209385 is about 59.3811387928.

The spelling of 209385 in words is "two hundred nine thousand, three hundred eighty-five".