6671309 has 2 divisors, whose sum is σ = 6671310. Its totient is φ = 6671308.

The previous prime is 6671281. The next prime is 6671323. The reversal of 6671309 is 9031766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4120900 + 2550409 = 2030^2 + 1597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6671309 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6671389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335654 + 3335655.

It is an arithmetic number, because the mean of its divisors is an integer number (3335655).

Almost surely, 2^6671309 is an apocalyptic number.

It is an amenable number.

6671309 is a deficient number, since it is larger than the sum of its proper divisors (1).

6671309 is an equidigital number, since it uses as much as digits as its factorization.

6671309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 6671309 is about 2582.8877250086. The cubic root of 6671309 is about 188.2508816691.

The spelling of 6671309 in words is "six million, six hundred seventy-one thousand, three hundred nine".