6504989 has 4 divisors (see below), whose sum is σ = 6515520. Its totient is φ = 6494460.

The previous prime is 6504983. The next prime is 6505003. The reversal of 6504989 is 9894056.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6504989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504983) 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, 4277 + ... + 5594.

It is an arithmetic number, because the mean of its divisors is an integer number (1628880).

Almost surely, 2^6504989 is an apocalyptic number.

It is an amenable number.

6504989 is a deficient number, since it is larger than the sum of its proper divisors (10531).

6504989 is an equidigital number, since it uses as much as digits as its factorization.

6504989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10530.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 6504989 is about 2550.4879925222. The cubic root of 6504989 is about 186.6732930613.

The spelling of 6504989 in words is "six million, five hundred four thousand, nine hundred eighty-nine".