243727727741 has 2 divisors, whose sum is σ = 243727727742. Its totient is φ = 243727727740.

The previous prime is 243727727731. The next prime is 243727727753. The reversal of 243727727741 is 147727727342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140603250841 + 103124476900 = 374971^2 + 321130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243727727741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243727727731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121863863870 + 121863863871.

It is an arithmetic number, because the mean of its divisors is an integer number (121863863871).

Almost surely, 2^243727727741 is an apocalyptic number.

It is an amenable number.

243727727741 is a deficient number, since it is larger than the sum of its proper divisors (1).

243727727741 is an equidigital number, since it uses as much as digits as its factorization.

243727727741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6453888, while the sum is 53.

The spelling of 243727727741 in words is "two hundred forty-three billion, seven hundred twenty-seven million, seven hundred twenty-seven thousand, seven hundred forty-one".