1323212173 has 2 divisors, whose sum is σ = 1323212174. Its totient is φ = 1323212172.

The previous prime is 1323212131. The next prime is 1323212237. The reversal of 1323212173 is 3712123231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1278563049 + 44649124 = 35757^2 + 6682^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323212173 - 2¹⁷ = 1323081101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323212273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661606086 + 661606087.

It is an arithmetic number, because the mean of its divisors is an integer number (661606087).

Almost surely, 2^1323212173 is an apocalyptic number.

It is an amenable number.

1323212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323212173 is an equidigital number, since it uses as much as digits as its factorization.

1323212173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 1323212173 is about 36375.9834643684. The cubic root of 1323212173 is about 1097.8503951210.

The spelling of 1323212173 in words is "one billion, three hundred twenty-three million, two hundred twelve thousand, one hundred seventy-three".