123443142149 has 2 divisors, whose sum is σ = 123443142150. Its totient is φ = 123443142148.

The previous prime is 123443142089. The next prime is 123443142181. The reversal of 123443142149 is 941241344321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113606073025 + 9837069124 = 337055^2 + 99182^2 .

It is an emirp because it is prime and its reverse (941241344321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123443142149 - 2¹⁶ = 123443076613 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 (123443145149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61721571074 + 61721571075.

It is an arithmetic number, because the mean of its divisors is an integer number (61721571075).

Almost surely, 2^123443142149 is an apocalyptic number.

It is an amenable number.

123443142149 is a deficient number, since it is larger than the sum of its proper divisors (1).

123443142149 is an equidigital number, since it uses as much as digits as its factorization.

123443142149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The spelling of 123443142149 in words is "one hundred twenty-three billion, four hundred forty-three million, one hundred forty-two thousand, one hundred forty-nine".