243234533957 has 2 divisors, whose sum is σ = 243234533958. Its totient is φ = 243234533956.

The previous prime is 243234533917. The next prime is 243234534007. The reversal of 243234533957 is 759335432342.

It is an a-pointer prime, because the next prime (243234534007) can be obtained adding 243234533957 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168468381601 + 74766152356 = 410449^2 + 273434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243234533957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243234533917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121617266978 + 121617266979.

It is an arithmetic number, because the mean of its divisors is an integer number (121617266979).

Almost surely, 2^243234533957 is an apocalyptic number.

It is an amenable number.

243234533957 is a deficient number, since it is larger than the sum of its proper divisors (1).

243234533957 is an equidigital number, since it uses as much as digits as its factorization.

243234533957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 50.

The spelling of 243234533957 in words is "two hundred forty-three billion, two hundred thirty-four million, five hundred thirty-three thousand, nine hundred fifty-seven".