6648289 has 4 divisors (see below), whose sum is σ = 6654256. Its totient is φ = 6642324.

The previous prime is 6648287. The next prime is 6648307. The reversal of 6648289 is 9828466.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6648289 - 2¹ = 6648287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6648287) 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, 759 + ... + 3724.

It is an arithmetic number, because the mean of its divisors is an integer number (1663564).

Almost surely, 2^6648289 is an apocalyptic number.

It is an amenable number.

6648289 is a deficient number, since it is larger than the sum of its proper divisors (5967).

6648289 is a wasteful number, since it uses less digits than its factorization.

6648289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966.

The product of its digits is 165888, while the sum is 43.

The square root of 6648289 is about 2578.4276216330. The cubic root of 6648289 is about 188.0341061557.

The spelling of 6648289 in words is "six million, six hundred forty-eight thousand, two hundred eighty-nine".