209696 has 12 divisors (see below), whose sum is σ = 412902. Its totient is φ = 104832.

The previous prime is 209687. The next prime is 209701. The reversal of 209696 is 696902.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 19600 = 436^2 + 140^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 6553 = 209696 / (2 + 0 + 9 + 6 + 9 + 6).

It is a nialpdrome in base 16.

It is an unprimeable number.

209696 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 3245 + ... + 3308.

2²⁰⁹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

209696 is a deficient number, since it is larger than the sum of its proper divisors (203206).

209696 is an equidigital number, since it uses as much as digits as its factorization.

209696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563 (or 6555 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 209696 is about 457.9257581748. The cubic root of 209696 is about 59.4105238943.

The spelling of 209696 in words is "two hundred nine thousand, six hundred ninety-six".