6513709 has 2 divisors, whose sum is σ = 6513710. Its totient is φ = 6513708.

The previous prime is 6513707. The next prime is 6513733. The reversal of 6513709 is 9073156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 896809 = 2370^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 6513709 - 2¹ = 6513707 is a prime.

Together with 6513707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6513707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3256854 + 3256855.

It is an arithmetic number, because the mean of its divisors is an integer number (3256855).

Almost surely, 2^6513709 is an apocalyptic number.

It is an amenable number.

6513709 is a deficient number, since it is larger than the sum of its proper divisors (1).

6513709 is an equidigital number, since it uses as much as digits as its factorization.

6513709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 6513709 is about 2552.1968967930. The cubic root of 6513709 is about 186.7566682625.

The spelling of 6513709 in words is "six million, five hundred thirteen thousand, seven hundred nine".