6647089 has 2 divisors, whose sum is σ = 6647090. Its totient is φ = 6647088.

The previous prime is 6647077. The next prime is 6647099. The reversal of 6647089 is 9807466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6589489 + 57600 = 2567^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 6647089 - 2¹⁷ = 6516017 is a prime.

It is not a weakly prime, because it can be changed into another prime (6647009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323544 + 3323545.

It is an arithmetic number, because the mean of its divisors is an integer number (3323545).

Almost surely, 2^6647089 is an apocalyptic number.

It is an amenable number.

6647089 is a deficient number, since it is larger than the sum of its proper divisors (1).

6647089 is an equidigital number, since it uses as much as digits as its factorization.

6647089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6647089 is about 2578.1949111733. The cubic root of 6647089 is about 188.0227922419.

The spelling of 6647089 in words is "six million, six hundred forty-seven thousand, eighty-nine".