123244243009 has 2 divisors, whose sum is σ = 123244243010. Its totient is φ = 123244243008.

The previous prime is 123244242997. The next prime is 123244243037. The reversal of 123244243009 is 900342442321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120409000000 + 2835243009 = 347000^2 + 53247^2 .

It is a cyclic number.

It is not a de Polignac number, because 123244243009 - 2⁵ = 123244242977 is a prime.

It is a super-2 number, since 2×123244243009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123244243709) 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, 61622121504 + 61622121505.

It is an arithmetic number, because the mean of its divisors is an integer number (61622121505).

Almost surely, 2^123244243009 is an apocalyptic number.

It is an amenable number.

123244243009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123244243009 is an equidigital number, since it uses as much as digits as its factorization.

123244243009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 123244243009 in words is "one hundred twenty-three billion, two hundred forty-four million, two hundred forty-three thousand, nine".