6730909 has 2 divisors, whose sum is σ = 6730910. Its totient is φ = 6730908.

The previous prime is 6730907. The next prime is 6730939. The reversal of 6730909 is 9090376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6125625 + 605284 = 2475^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 6730909 - 2¹ = 6730907 is a prime.

Together with 6730907, it forms a pair of twin primes.

6730909 is a modest number, since divided by 909 gives 673 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6730903) 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, 3365454 + 3365455.

It is an arithmetic number, because the mean of its divisors is an integer number (3365455).

Almost surely, 2^6730909 is an apocalyptic number.

It is an amenable number.

6730909 is a deficient number, since it is larger than the sum of its proper divisors (1).

6730909 is an equidigital number, since it uses as much as digits as its factorization.

6730909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 6730909 is about 2594.3995451742. The cubic root of 6730909 is about 188.8098177439.

It can be divided in two parts, 67 and 30909, that added together give a square (30976 = 176²).

The spelling of 6730909 in words is "six million, seven hundred thirty thousand, nine hundred nine".