347943457321 has 2 divisors, whose sum is σ = 347943457322. Its totient is φ = 347943457320.

The previous prime is 347943457297. The next prime is 347943457339. The reversal of 347943457321 is 123754349743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347934819600 + 8637721 = 589860^2 + 2939^2 .

It is a cyclic number.

It is not a de Polignac number, because 347943457321 - 2⁷ = 347943457193 is a prime.

It is not a weakly prime, because it can be changed into another prime (347943457721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173971728660 + 173971728661.

It is an arithmetic number, because the mean of its divisors is an integer number (173971728661).

Almost surely, 2^347943457321 is an apocalyptic number.

It is an amenable number.

347943457321 is a deficient number, since it is larger than the sum of its proper divisors (1).

347943457321 is an equidigital number, since it uses as much as digits as its factorization.

347943457321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 52.

The spelling of 347943457321 in words is "three hundred forty-seven billion, nine hundred forty-three million, four hundred fifty-seven thousand, three hundred twenty-one".