2047809 has 8 divisors (see below), whose sum is σ = 2743552. Its totient is φ = 1358640.

The previous prime is 2047781. The next prime is 2047811. The reversal of 2047809 is 9087402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2047809 - 2⁸ = 2047553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2047819) 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 7 ways as a sum of consecutive naturals, for example, 862 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (342944).

2^2047809 is an apocalyptic number.

It is an amenable number.

2047809 is a deficient number, since it is larger than the sum of its proper divisors (695743).

2047809 is a wasteful number, since it uses less digits than its factorization.

2047809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2047809 is about 1431.0167713902. The cubic root of 2047809 is about 126.9881362014.

The spelling of 2047809 in words is "two million, forty-seven thousand, eight hundred nine".