243388247569 has 2 divisors, whose sum is σ = 243388247570. Its totient is φ = 243388247568.

The previous prime is 243388247551. The next prime is 243388247587. The reversal of 243388247569 is 965742883342.

It is a balanced prime because it is at equal distance from previous prime (243388247551) and next prime (243388247587).

It can be written as a sum of positive squares in only one way, i.e., 219998521600 + 23389725969 = 469040^2 + 152937^2 .

It is a cyclic number.

It is not a de Polignac number, because 243388247569 - 2¹³ = 243388239377 is a prime.

It is a super-2 number, since 2×243388247569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243388257569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121694123784 + 121694123785.

It is an arithmetic number, because the mean of its divisors is an integer number (121694123785).

Almost surely, 2^243388247569 is an apocalyptic number.

It is an amenable number.

243388247569 is a deficient number, since it is larger than the sum of its proper divisors (1).

243388247569 is an equidigital number, since it uses as much as digits as its factorization.

243388247569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 61.

The spelling of 243388247569 in words is "two hundred forty-three billion, three hundred eighty-eight million, two hundred forty-seven thousand, five hundred sixty-nine".