2050809 has 4 divisors (see below), whose sum is σ = 2734416. Its totient is φ = 1367204.

The previous prime is 2050787. The next prime is 2050813. The reversal of 2050809 is 9080502.

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 2050809 - 2⁵ = 2050777 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2050819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341799 + ... + 341804.

It is an arithmetic number, because the mean of its divisors is an integer number (683604).

2^2050809 is an apocalyptic number.

It is an amenable number.

2050809 is a deficient number, since it is larger than the sum of its proper divisors (683607).

2050809 is an equidigital number, since it uses as much as digits as its factorization.

2050809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683606.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2050809 is about 1432.0645935153. The cubic root of 2050809 is about 127.0501176532.

The spelling of 2050809 in words is "two million, fifty thousand, eight hundred nine".