243721484127353 has 2 divisors, whose sum is σ = 243721484127354. Its totient is φ = 243721484127352.

The previous prime is 243721484127167. The next prime is 243721484127439. The reversal of 243721484127353 is 353721484127342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156328209784384 + 87393274342969 = 12503128^2 + 9348437^2 .

It is a cyclic number.

It is not a de Polignac number, because 243721484127353 - 2⁴⁴ = 226129298082937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (243721484129353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121860742063676 + 121860742063677.

It is an arithmetic number, because the mean of its divisors is an integer number (121860742063677).

Almost surely, 2^{243721484127353} is an apocalyptic number.

It is an amenable number.

243721484127353 is a deficient number, since it is larger than the sum of its proper divisors (1).

243721484127353 is an equidigital number, since it uses as much as digits as its factorization.

243721484127353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27095040, while the sum is 56.

The spelling of 243721484127353 in words is "two hundred forty-three trillion, seven hundred twenty-one billion, four hundred eighty-four million, one hundred twenty-seven thousand, three hundred fifty-three".