6479509 has 2 divisors, whose sum is σ = 6479510. Its totient is φ = 6479508.

The previous prime is 6479489. The next prime is 6479521. The reversal of 6479509 is 9059746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6360484 + 119025 = 2522^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 6479509 - 2¹⁹ = 5955221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6479549) 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, 3239754 + 3239755.

It is an arithmetic number, because the mean of its divisors is an integer number (3239755).

Almost surely, 2^6479509 is an apocalyptic number.

It is an amenable number.

6479509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6479509 is an equidigital number, since it uses as much as digits as its factorization.

6479509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 6479509 is about 2545.4879689364. The cubic root of 6479509 is about 186.4292414384.

The spelling of 6479509 in words is "six million, four hundred seventy-nine thousand, five hundred nine".