243351993029 has 2 divisors, whose sum is σ = 243351993030. Its totient is φ = 243351993028.

The previous prime is 243351993019. The next prime is 243351993047. The reversal of 243351993029 is 920399153342.

It is a happy number.

243351993029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129646804225 + 113705188804 = 360065^2 + 337202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243351993029 is a prime.

It is a super-2 number, since 2×243351993029² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243351993019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121675996514 + 121675996515.

It is an arithmetic number, because the mean of its divisors is an integer number (121675996515).

Almost surely, 2^243351993029 is an apocalyptic number.

It is an amenable number.

243351993029 is a deficient number, since it is larger than the sum of its proper divisors (1).

243351993029 is an equidigital number, since it uses as much as digits as its factorization.

243351993029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 50.

The spelling of 243351993029 in words is "two hundred forty-three billion, three hundred fifty-one million, nine hundred ninety-three thousand, twenty-nine".