243406338053293 has 2 divisors, whose sum is σ = 243406338053294. Its totient is φ = 243406338053292.

The previous prime is 243406338053261. The next prime is 243406338053299. The reversal of 243406338053293 is 392350833604342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228498383842569 + 14907954210724 = 15116163^2 + 3861082^2 .

It is a cyclic number.

It is not a de Polignac number, because 243406338053293 - 2⁵ = 243406338053261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243406338053299) 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, 121703169026646 + 121703169026647.

It is an arithmetic number, because the mean of its divisors is an integer number (121703169026647).

Almost surely, 2^{243406338053293} is an apocalyptic number.

It is an amenable number.

243406338053293 is a deficient number, since it is larger than the sum of its proper divisors (1).

243406338053293 is an equidigital number, since it uses as much as digits as its factorization.

243406338053293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33592320, while the sum is 55.

The spelling of 243406338053293 in words is "two hundred forty-three trillion, four hundred six billion, three hundred thirty-eight million, fifty-three thousand, two hundred ninety-three".