123311324189 has 2 divisors, whose sum is σ = 123311324190. Its totient is φ = 123311324188.

The previous prime is 123311324173. The next prime is 123311324237. The reversal of 123311324189 is 981423113321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119546520025 + 3764804164 = 345755^2 + 61358^2 .

It is a cyclic number.

It is not a de Polignac number, because 123311324189 - 2⁴ = 123311324173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123311924189) 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, 61655662094 + 61655662095.

It is an arithmetic number, because the mean of its divisors is an integer number (61655662095).

Almost surely, 2^123311324189 is an apocalyptic number.

It is an amenable number.

123311324189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123311324189 is an equidigital number, since it uses as much as digits as its factorization.

123311324189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The spelling of 123311324189 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred twenty-four thousand, one hundred eighty-nine".