243243243149 has 2 divisors, whose sum is σ = 243243243150. Its totient is φ = 243243243148.

The previous prime is 243243243127. The next prime is 243243243181. The reversal of 243243243149 is 941342342342.

243243243149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173987425924 + 69255817225 = 417118^2 + 263165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243243243149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213243149) 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, 121621621574 + 121621621575.

It is an arithmetic number, because the mean of its divisors is an integer number (121621621575).

Almost surely, 2^243243243149 is an apocalyptic number.

It is an amenable number.

243243243149 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243243149 is an equidigital number, since it uses as much as digits as its factorization.

243243243149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 41.

The spelling of 243243243149 in words is "two hundred forty-three billion, two hundred forty-three million, two hundred forty-three thousand, one hundred forty-nine".