13321443173 has 2 divisors, whose sum is σ = 13321443174. Its totient is φ = 13321443172.

The previous prime is 13321443169. The next prime is 13321443197. The reversal of 13321443173 is 37134412331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9964631329 + 3356811844 = 99823^2 + 57938^2 .

It is an emirp because it is prime and its reverse (37134412331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13321443173 - 2² = 13321443169 is a prime.

It is a super-2 number, since 2×13321443173² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321443143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660721586 + 6660721587.

It is an arithmetic number, because the mean of its divisors is an integer number (6660721587).

Almost surely, 2^13321443173 is an apocalyptic number.

It is an amenable number.

13321443173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321443173 is an equidigital number, since it uses as much as digits as its factorization.

13321443173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The spelling of 13321443173 in words is "thirteen billion, three hundred twenty-one million, four hundred forty-three thousand, one hundred seventy-three".