243206843357 has 2 divisors, whose sum is σ = 243206843358. Its totient is φ = 243206843356.

The previous prime is 243206843311. The next prime is 243206843437. The reversal of 243206843357 is 753348602342.

243206843357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242266746436 + 940096921 = 492206^2 + 30661^2 .

It is a cyclic number.

It is not a de Polignac number, because 243206843357 - 2²⁰ = 243205794781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243206849357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121603421678 + 121603421679.

It is an arithmetic number, because the mean of its divisors is an integer number (121603421679).

Almost surely, 2^243206843357 is an apocalyptic number.

It is an amenable number.

243206843357 is a deficient number, since it is larger than the sum of its proper divisors (1).

243206843357 is an equidigital number, since it uses as much as digits as its factorization.

243206843357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 243206843357 in words is "two hundred forty-three billion, two hundred six million, eight hundred forty-three thousand, three hundred fifty-seven".