2052809 has 4 divisors (see below), whose sum is σ = 2239440. Its totient is φ = 1866180.

The previous prime is 2052803. The next prime is 2052821. The reversal of 2052809 is 9082502.

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 2052809 - 2⁴ = 2052793 is a prime.

It is a super-3 number, since 3×2052809³ = 25951764048367533387, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2052803) 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, 93299 + ... + 93320.

It is an arithmetic number, because the mean of its divisors is an integer number (559860).

2^2052809 is an apocalyptic number.

It is an amenable number.

2052809 is a deficient number, since it is larger than the sum of its proper divisors (186631).

2052809 is a wasteful number, since it uses less digits than its factorization.

2052809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186630.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2052809 is about 1432.7627158745. The cubic root of 2052809 is about 127.0914050473.

The spelling of 2052809 in words is "two million, fifty-two thousand, eight hundred nine".