243723331249 has 2 divisors, whose sum is σ = 243723331250. Its totient is φ = 243723331248.

The previous prime is 243723331157. The next prime is 243723331277. The reversal of 243723331249 is 942133327342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206606611600 + 37116719649 = 454540^2 + 192657^2 .

It is a cyclic number.

It is not a de Polignac number, because 243723331249 - 2³⁵ = 209363592881 is a prime.

It is not a weakly prime, because it can be changed into another prime (243723331289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121861665624 + 121861665625.

It is an arithmetic number, because the mean of its divisors is an integer number (121861665625).

Almost surely, 2^243723331249 is an apocalyptic number.

It is an amenable number.

243723331249 is a deficient number, since it is larger than the sum of its proper divisors (1).

243723331249 is an equidigital number, since it uses as much as digits as its factorization.

243723331249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 43.

The spelling of 243723331249 in words is "two hundred forty-three billion, seven hundred twenty-three million, three hundred thirty-one thousand, two hundred forty-nine".