243045202913 has 2 divisors, whose sum is σ = 243045202914. Its totient is φ = 243045202912.

The previous prime is 243045202909. The next prime is 243045202949. The reversal of 243045202913 is 319202540342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235349176384 + 7696026529 = 485128^2 + 87727^2 .

It is a cyclic number.

It is not a de Polignac number, because 243045202913 - 2² = 243045202909 is a prime.

It is not a weakly prime, because it can be changed into another prime (243045202973) 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, 121522601456 + 121522601457.

It is an arithmetic number, because the mean of its divisors is an integer number (121522601457).

Almost surely, 2^243045202913 is an apocalyptic number.

It is an amenable number.

243045202913 is a deficient number, since it is larger than the sum of its proper divisors (1).

243045202913 is an equidigital number, since it uses as much as digits as its factorization.

243045202913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 243045202913 in words is "two hundred forty-three billion, forty-five million, two hundred two thousand, nine hundred thirteen".