243034561493 has 2 divisors, whose sum is σ = 243034561494. Its totient is φ = 243034561492.

The previous prime is 243034561477. The next prime is 243034561519. The reversal of 243034561493 is 394165430342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242830157284 + 204404209 = 492778^2 + 14297^2 .

It is a cyclic number.

It is not a de Polignac number, because 243034561493 - 2⁴ = 243034561477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243034560493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121517280746 + 121517280747.

It is an arithmetic number, because the mean of its divisors is an integer number (121517280747).

Almost surely, 2^243034561493 is an apocalyptic number.

It is an amenable number.

243034561493 is a deficient number, since it is larger than the sum of its proper divisors (1).

243034561493 is an equidigital number, since it uses as much as digits as its factorization.

243034561493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 243034561493 in words is "two hundred forty-three billion, thirty-four million, five hundred sixty-one thousand, four hundred ninety-three".