5987809 has 3 divisors (see below), whose sum is σ = 5990257. Its totient is φ = 5985362.

The previous prime is 5987803. The next prime is 5987819. The reversal of 5987809 is 9087895.

The square root of 5987809 is 2447.

It is a perfect power (a square), and thus also a powerful number.

5987809 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 5987809 - 2⁵ = 5987777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5987803) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1224 + ... + 3670.

Almost surely, 2^5987809 is an apocalyptic number.

5987809 is the 2447-th square number.

5987809 is the 1224-th centered octagonal number.

It is an amenable number.

5987809 is a deficient number, since it is larger than the sum of its proper divisors (2448).

5987809 is an frugal number, since it uses more digits than its factorization.

5987809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The cubic root of 5987809 is about 181.5889062970.

The spelling of 5987809 in words is "five million, nine hundred eighty-seven thousand, eight hundred nine".