190209 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 115920.

The previous prime is 190207. The next prime is 190243. The reversal of 190209 is 902091.

It is a happy number.

It is not a de Polignac number, because 190209 - 2¹ = 190207 is a prime.

190209 is a modest number, since divided by 209 gives 19 as remainder.

It is not an unprimeable number, because it can be changed into a prime (190207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2644 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2¹⁹⁰²⁰⁹ is an apocalyptic number.

190209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

190209 is a deficient number, since it is larger than the sum of its proper divisors (86271).

190209 is a wasteful number, since it uses less digits than its factorization.

190209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 190209 is about 436.1295679039. The cubic root of 190209 is about 57.5100423544.

The spelling of 190209 in words is "one hundred ninety thousand, two hundred nine".