6485209 has 2 divisors, whose sum is σ = 6485210. Its totient is φ = 6485208.

The previous prime is 6485207. The next prime is 6485233. The reversal of 6485209 is 9025846.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5745609 + 739600 = 2397^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 6485209 - 2¹ = 6485207 is a prime.

Together with 6485207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6485203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3242604 + 3242605.

It is an arithmetic number, because the mean of its divisors is an integer number (3242605).

Almost surely, 2^6485209 is an apocalyptic number.

It is an amenable number.

6485209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6485209 is an equidigital number, since it uses as much as digits as its factorization.

6485209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 6485209 is about 2546.6073509672. The cubic root of 6485209 is about 186.4838924532.

The spelling of 6485209 in words is "six million, four hundred eighty-five thousand, two hundred nine".