243454737241 has 2 divisors, whose sum is σ = 243454737242. Its totient is φ = 243454737240.

The previous prime is 243454737233. The next prime is 243454737259. The reversal of 243454737241 is 142737454342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193265744400 + 50188992841 = 439620^2 + 224029^2 .

It is a cyclic number.

It is not a de Polignac number, because 243454737241 - 2³ = 243454737233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243454737191 and 243454737200.

It is not a weakly prime, because it can be changed into another prime (243454731241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121727368620 + 121727368621.

It is an arithmetic number, because the mean of its divisors is an integer number (121727368621).

Almost surely, 2^243454737241 is an apocalyptic number.

It is an amenable number.

243454737241 is a deficient number, since it is larger than the sum of its proper divisors (1).

243454737241 is an equidigital number, since it uses as much as digits as its factorization.

243454737241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 46.

The spelling of 243454737241 in words is "two hundred forty-three billion, four hundred fifty-four million, seven hundred thirty-seven thousand, two hundred forty-one".