6543212173 has 2 divisors, whose sum is σ = 6543212174. Its totient is φ = 6543212172.

The previous prime is 6543212171. The next prime is 6543212189. The reversal of 6543212173 is 3712123456.

6543212173 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6220003689 + 323208484 = 78867^2 + 17978^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543212173 - 2¹ = 6543212171 is a prime.

Together with 6543212171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6543212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271606086 + 3271606087.

It is an arithmetic number, because the mean of its divisors is an integer number (3271606087).

Almost surely, 2^6543212173 is an apocalyptic number.

It is an amenable number.

6543212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

6543212173 is an equidigital number, since it uses as much as digits as its factorization.

6543212173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 6543212173 is about 80890.1240758104. The cubic root of 6543212173 is about 1870.3820864137.

The spelling of 6543212173 in words is "six billion, five hundred forty-three million, two hundred twelve thousand, one hundred seventy-three".