209106 has 12 divisors (see below), whose sum is σ = 453102. Its totient is φ = 69696.

The previous prime is 209089. The next prime is 209123. The reversal of 209106 is 601902.

It is an interprime number because it is at equal distance from previous prime (209089) and next prime (209123).

It can be written as a sum of positive squares in only one way, i.e., 189225 + 19881 = 435^2 + 141^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11617 = 209106 / (2 + 0 + 9 + 1 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5791 + ... + 5826.

2²⁰⁹¹⁰⁶ is an apocalyptic number.

209106 is an abundant number, since it is smaller than the sum of its proper divisors (243996).

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

209106 is a wasteful number, since it uses less digits than its factorization.

209106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11625 (or 11622 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 209106 is about 457.2810951701. The cubic root of 209106 is about 59.3547524683.

The spelling of 209106 in words is "two hundred nine thousand, one hundred six".