5281809 has 8 divisors (see below), whose sum is σ = 7584192. Its totient is φ = 3250320.

The previous prime is 5281763. The next prime is 5281817. The reversal of 5281809 is 9081825.

It is a happy number.

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

It is not a de Polignac number, because 5281809 - 2⁷ = 5281681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5281809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5281879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67677 + ... + 67754.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^5281809 is an apocalyptic number.

It is an amenable number.

5281809 is a deficient number, since it is larger than the sum of its proper divisors (2302383).

5281809 is a wasteful number, since it uses less digits than its factorization.

5281809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135447.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 5281809 is about 2298.2186580045. The cubic root of 5281809 is about 174.1516381906.

The spelling of 5281809 in words is "five million, two hundred eighty-one thousand, eight hundred nine".