243808343 has 2 divisors, whose sum is σ = 243808344. Its totient is φ = 243808342.

The previous prime is 243808319. The next prime is 243808403. The reversal of 243808343 is 343808342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243808343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243808843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121904171 + 121904172.

It is an arithmetic number, because the mean of its divisors is an integer number (121904172).

Almost surely, 2^243808343 is an apocalyptic number.

243808343 is a deficient number, since it is larger than the sum of its proper divisors (1).

243808343 is an equidigital number, since it uses as much as digits as its factorization.

243808343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 243808343 is about 15614.3633555775. The cubic root of 243808343 is about 624.7163239575.

Subtracting 243808343 from its reverse (343808342), we obtain a palindrome (99999999).

It can be divided in two parts, 24380 and 8343, that added together give a palindrome (32723).

The spelling of 243808343 in words is "two hundred forty-three million, eight hundred eight thousand, three hundred forty-three".