243142302089 has 2 divisors, whose sum is σ = 243142302090. Its totient is φ = 243142302088.

The previous prime is 243142302083. The next prime is 243142302133. The reversal of 243142302089 is 980203241342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145100046400 + 98042255689 = 380920^2 + 313117^2 .

It is a cyclic number.

It is not a de Polignac number, because 243142302089 - 2³² = 238847334793 is a prime.

It is not a weakly prime, because it can be changed into another prime (243142302083) 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, 121571151044 + 121571151045.

It is an arithmetic number, because the mean of its divisors is an integer number (121571151045).

Almost surely, 2^243142302089 is an apocalyptic number.

It is an amenable number.

243142302089 is a deficient number, since it is larger than the sum of its proper divisors (1).

243142302089 is an equidigital number, since it uses as much as digits as its factorization.

243142302089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 243142302089 in words is "two hundred forty-three billion, one hundred forty-two million, three hundred two thousand, eighty-nine".