5287809 has 4 divisors (see below), whose sum is σ = 7050416. Its totient is φ = 3525204.

The previous prime is 5287801. The next prime is 5287813. The reversal of 5287809 is 9087825.

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 not a de Polignac number, because 5287809 - 2³ = 5287801 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5287801) 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, 881299 + ... + 881304.

It is an arithmetic number, because the mean of its divisors is an integer number (1762604).

Almost surely, 2^5287809 is an apocalyptic number.

It is an amenable number.

5287809 is a deficient number, since it is larger than the sum of its proper divisors (1762607).

5287809 is a wasteful number, since it uses less digits than its factorization.

5287809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762606.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 5287809 is about 2299.5236463233. The cubic root of 5287809 is about 174.2175571724.

The spelling of 5287809 in words is "five million, two hundred eighty-seven thousand, eight hundred nine".