123414431243 has 4 divisors (see below), whose sum is σ = 123682141968. Its totient is φ = 123146720520.

The previous prime is 123414431237. The next prime is 123414431249. The reversal of 123414431243 is 342134414321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342134414321 = 7 ⋅48876344903.

It is an interprime number because it is at equal distance from previous prime (123414431237) and next prime (123414431249).

It is a cyclic number.

It is not a de Polignac number, because 123414431243 - 2³⁴ = 106234562059 is a prime.

It is a super-2 number, since 2×123414431243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123414431249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133854671 + ... + 133855592.

It is an arithmetic number, because the mean of its divisors is an integer number (30920535492).

Almost surely, 2^123414431243 is an apocalyptic number.

123414431243 is a deficient number, since it is larger than the sum of its proper divisors (267710725).

123414431243 is an equidigital number, since it uses as much as digits as its factorization.

123414431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267710724.

The product of its digits is 27648, while the sum is 32.

Adding to 123414431243 its reverse (342134414321), we get a palindrome (465548845564).

The spelling of 123414431243 in words is "one hundred twenty-three billion, four hundred fourteen million, four hundred thirty-one thousand, two hundred forty-three".