243302811593 has 2 divisors, whose sum is σ = 243302811594. Its totient is φ = 243302811592.

The previous prime is 243302811589. The next prime is 243302811623. The reversal of 243302811593 is 395118203342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147219550864 + 96083260729 = 383692^2 + 309973^2 .

It is a cyclic number.

It is not a de Polignac number, because 243302811593 - 2² = 243302811589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243302811593.

It is not a weakly prime, because it can be changed into another prime (243302811523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121651405796 + 121651405797.

It is an arithmetic number, because the mean of its divisors is an integer number (121651405797).

Almost surely, 2^243302811593 is an apocalyptic number.

It is an amenable number.

243302811593 is a deficient number, since it is larger than the sum of its proper divisors (1).

243302811593 is an equidigital number, since it uses as much as digits as its factorization.

243302811593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 243302811593 in words is "two hundred forty-three billion, three hundred two million, eight hundred eleven thousand, five hundred ninety-three".