1996209 has 12 divisors (see below), whose sum is σ = 2897076. Its totient is φ = 1324512.

The previous prime is 1996207. The next prime is 1996217. The reversal of 1996209 is 9026991.

It can be written as a sum of positive squares in 2 ways, for example, as 1617984 + 378225 = 1272^2 + 615^2 .

It is not a de Polignac number, because 1996209 - 2¹ = 1996207 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1996207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2259 + ... + 3015.

It is an arithmetic number, because the mean of its divisors is an integer number (241423).

2^1996209 is an apocalyptic number.

It is an amenable number.

1996209 is a deficient number, since it is larger than the sum of its proper divisors (900867).

1996209 is a wasteful number, since it uses less digits than its factorization.

1996209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1053 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1996209 is about 1412.8726057221. The cubic root of 1996209 is about 125.9124486271.

The spelling of 1996209 in words is "one million, nine hundred ninety-six thousand, two hundred nine".