209104 has 20 divisors (see below), whose sum is σ = 463264. Its totient is φ = 89568.

The previous prime is 209089. The next prime is 209123. The reversal of 209104 is 401902.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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, 822 + ... + 1045.

2²⁰⁹¹⁰⁴ is an apocalyptic number.

It is an amenable number.

209104 is an abundant number, since it is smaller than the sum of its proper divisors (254160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209104 is a wasteful number, since it uses less digits than its factorization.

209104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1876 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 209104 is about 457.2789083262. The cubic root of 209104 is about 59.3545632343.

It can be divided in two parts, 209 and 104, that multiplied together give a triangular number (21736 = T₂₀₈).

The spelling of 209104 in words is "two hundred nine thousand, one hundred four".