123243431052433 has 2 divisors, whose sum is σ = 123243431052434. Its totient is φ = 123243431052432.

The previous prime is 123243431052431. The next prime is 123243431052563. The reversal of 123243431052433 is 334250134342321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114756970651024 + 8486460401409 = 10712468^2 + 2913153^2 .

It is a cyclic number.

It is not a de Polignac number, because 123243431052433 - 2¹ = 123243431052431 is a prime.

Together with 123243431052431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123243431052431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621715526216 + 61621715526217.

It is an arithmetic number, because the mean of its divisors is an integer number (61621715526217).

Almost surely, 2^{123243431052433} is an apocalyptic number.

It is an amenable number.

123243431052433 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243431052433 is an equidigital number, since it uses as much as digits as its factorization.

123243431052433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 40.

Adding to 123243431052433 its reverse (334250134342321), we get a palindrome (457493565394754).

The spelling of 123243431052433 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-one million, fifty-two thousand, four hundred thirty-three".