2068809 has 4 divisors (see below), whose sum is σ = 2758416. Its totient is φ = 1379204.

The previous prime is 2068769. The next prime is 2068811. The reversal of 2068809 is 9088602.

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.

It is a cyclic number.

It is not a de Polignac number, because 2068809 - 2⁷ = 2068681 is a prime.

It is a D-number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2068809.

It is not an unprimeable number, because it can be changed into a prime (2068109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344799 + ... + 344804.

It is an arithmetic number, because the mean of its divisors is an integer number (689604).

2^2068809 is an apocalyptic number.

It is an amenable number.

2068809 is a deficient number, since it is larger than the sum of its proper divisors (689607).

2068809 is an equidigital number, since it uses as much as digits as its factorization.

2068809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689606.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 2068809 is about 1438.3354963290. The cubic root of 2068809 is about 127.4207427450.

The spelling of 2068809 in words is "two million, sixty-eight thousand, eight hundred nine".