671341709 has 2 divisors, whose sum is σ = 671341710. Its totient is φ = 671341708.

The previous prime is 671341703. The next prime is 671341717. The reversal of 671341709 is 907143176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640849225 + 30492484 = 25315^2 + 5522^2 .

It is a cyclic number.

It is not a de Polignac number, because 671341709 - 2⁸ = 671341453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671341703) 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, 335670854 + 335670855.

It is an arithmetic number, because the mean of its divisors is an integer number (335670855).

Almost surely, 2^671341709 is an apocalyptic number.

It is an amenable number.

671341709 is a deficient number, since it is larger than the sum of its proper divisors (1).

671341709 is an equidigital number, since it uses as much as digits as its factorization.

671341709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 671341709 is about 25910.2626192789. The cubic root of 671341709 is about 875.6177228247.

The spelling of 671341709 in words is "six hundred seventy-one million, three hundred forty-one thousand, seven hundred nine".