6628289 has 2 divisors, whose sum is σ = 6628290. Its totient is φ = 6628288.

The previous prime is 6628277. The next prime is 6628309. The reversal of 6628289 is 9828266.

6628289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4068289 + 2560000 = 2017^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 6628289 - 2⁸ = 6628033 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6⁴ + 6⁵ + 2¹⁶ + 8⁶ + 2²² + 8⁷ + 9² .

It is not a weakly prime, because it can be changed into another prime (6628189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314144 + 3314145.

It is an arithmetic number, because the mean of its divisors is an integer number (3314145).

Almost surely, 2^6628289 is an apocalyptic number.

It is an amenable number.

6628289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628289 is an equidigital number, since it uses as much as digits as its factorization.

6628289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 6628289 is about 2574.5463678093. The cubic root of 6628289 is about 187.8453628807.

The spelling of 6628289 in words is "six million, six hundred twenty-eight thousand, two hundred eighty-nine".