5239809 has 12 divisors (see below), whose sum is σ = 7849296. Its totient is φ = 3493044.

The previous prime is 5239789. The next prime is 5239811. The reversal of 5239809 is 9089325.

It is not a de Polignac number, because 5239809 - 2⁵ = 5239777 is a prime.

It is a Curzon number.

5239809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5239879) 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 11 ways as a sum of consecutive naturals, for example, 10539 + ... + 11024.

It is an arithmetic number, because the mean of its divisors is an integer number (654108).

Almost surely, 2^5239809 is an apocalyptic number.

It is an amenable number.

5239809 is a deficient number, since it is larger than the sum of its proper divisors (2609487).

5239809 is an equidigital number, since it uses as much as digits as its factorization.

5239809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21578 (or 21566 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 5239809 is about 2289.0629087030. The cubic root of 5239809 is about 173.6888016620.

The spelling of 5239809 in words is "five million, two hundred thirty-nine thousand, eight hundred nine".