243123340373 has 2 divisors, whose sum is σ = 243123340374. Its totient is φ = 243123340372.

The previous prime is 243123340331. The next prime is 243123340423. The reversal of 243123340373 is 373043321342.

243123340373 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., 141239169124 + 101884171249 = 375818^2 + 319193^2 .

It is a cyclic number.

It is not a de Polignac number, because 243123340373 - 2³⁴ = 225943471189 is a prime.

It is a super-2 number, since 2×243123340373² (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 (243123343373) 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, 121561670186 + 121561670187.

It is an arithmetic number, because the mean of its divisors is an integer number (121561670187).

Almost surely, 2^243123340373 is an apocalyptic number.

It is an amenable number.

243123340373 is a deficient number, since it is larger than the sum of its proper divisors (1).

243123340373 is an equidigital number, since it uses as much as digits as its factorization.

243123340373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 35.

The spelling of 243123340373 in words is "two hundred forty-three billion, one hundred twenty-three million, three hundred forty thousand, three hundred seventy-three".