671322009443 has 2 divisors, whose sum is σ = 671322009444. Its totient is φ = 671322009442.

The previous prime is 671322009433. The next prime is 671322009467. The reversal of 671322009443 is 344900223176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671322009443 - 2²⁸ = 671053573987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671322009443.

It is not a weakly prime, because it can be changed into another prime (671322009433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335661004721 + 335661004722.

It is an arithmetic number, because the mean of its divisors is an integer number (335661004722).

Almost surely, 2^671322009443 is an apocalyptic number.

671322009443 is a deficient number, since it is larger than the sum of its proper divisors (1).

671322009443 is an equidigital number, since it uses as much as digits as its factorization.

671322009443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 671322009443 in words is "six hundred seventy-one billion, three hundred twenty-two million, nine thousand, four hundred forty-three".