1213423614173 has 2 divisors, whose sum is σ = 1213423614174. Its totient is φ = 1213423614172.

The previous prime is 1213423614127. The next prime is 1213423614199. The reversal of 1213423614173 is 3714163243121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887367768004 + 326055846169 = 942002^2 + 571013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213423614173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213423617173) 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, 606711807086 + 606711807087.

It is an arithmetic number, because the mean of its divisors is an integer number (606711807087).

Almost surely, 2^{1213423614173} is an apocalyptic number.

It is an amenable number.

1213423614173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213423614173 is an equidigital number, since it uses as much as digits as its factorization.

1213423614173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

Adding to 1213423614173 its reverse (3714163243121), we get a palindrome (4927586857294).

The spelling of 1213423614173 in words is "one trillion, two hundred thirteen billion, four hundred twenty-three million, six hundred fourteen thousand, one hundred seventy-three".