123423824189 has 2 divisors, whose sum is σ = 123423824190. Its totient is φ = 123423824188.

The previous prime is 123423824131. The next prime is 123423824197. The reversal of 123423824189 is 981428324321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80504415289 + 42919408900 = 283733^2 + 207170^2 .

It is an emirp because it is prime and its reverse (981428324321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123423824189 - 2⁸ = 123423823933 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 (123423824089) 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, 61711912094 + 61711912095.

It is an arithmetic number, because the mean of its divisors is an integer number (61711912095).

Almost surely, 2^123423824189 is an apocalyptic number.

It is an amenable number.

123423824189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123423824189 is an equidigital number, since it uses as much as digits as its factorization.

123423824189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 47.

The spelling of 123423824189 in words is "one hundred twenty-three billion, four hundred twenty-three million, eight hundred twenty-four thousand, one hundred eighty-nine".