196909 has 4 divisors (see below), whose sum is σ = 198016. Its totient is φ = 195804.

The previous prime is 196907. The next prime is 196919. The reversal of 196909 is 909691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 196909 - 2¹ = 196907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196901) by changing a digit.

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, 219 + ... + 664.

It is an arithmetic number, because the mean of its divisors is an integer number (49504).

2¹⁹⁶⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

196909 is a deficient number, since it is larger than the sum of its proper divisors (1107).

196909 is an equidigital number, since it uses as much as digits as its factorization.

196909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 196909 is about 443.7442957380. The cubic root of 196909 is about 58.1775179557.

The spelling of 196909 in words is "one hundred ninety-six thousand, nine hundred nine".