123213435173 has 2 divisors, whose sum is σ = 123213435174. Its totient is φ = 123213435172.

The previous prime is 123213435161. The next prime is 123213435199. The reversal of 123213435173 is 371534312321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118819468804 + 4393966369 = 344702^2 + 66287^2 .

It is a cyclic number.

It is not a de Polignac number, because 123213435173 - 2²⁸ = 122944999717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123213435473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606717586 + 61606717587.

It is an arithmetic number, because the mean of its divisors is an integer number (61606717587).

Almost surely, 2^123213435173 is an apocalyptic number.

It is an amenable number.

123213435173 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213435173 is an equidigital number, since it uses as much as digits as its factorization.

123213435173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 35.

Adding to 123213435173 its reverse (371534312321), we get a palindrome (494747747494).

The spelling of 123213435173 in words is "one hundred twenty-three billion, two hundred thirteen million, four hundred thirty-five thousand, one hundred seventy-three".