196809 has 12 divisors (see below), whose sum is σ = 279984. Its totient is φ = 122944.

The previous prime is 196799. The next prime is 196817. The reversal of 196809 is 908691.

It is a happy number.

It is not a de Polignac number, because 196809 - 2⁷ = 196681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196809.

It is not an unprimeable number, because it can be changed into a prime (196879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 754 + ... + 980.

It is an arithmetic number, because the mean of its divisors is an integer number (23332).

2¹⁹⁶⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

196809 is a deficient number, since it is larger than the sum of its proper divisors (83175).

196809 is a wasteful number, since it uses less digits than its factorization.

196809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 196809 is about 443.6316039238. The cubic root of 196809 is about 58.1676678271.

The spelling of 196809 in words is "one hundred ninety-six thousand, eight hundred nine".