123423143465 has 4 divisors (see below), whose sum is σ = 148107772164. Its totient is φ = 98738514768.

The previous prime is 123423143357. The next prime is 123423143479. The reversal of 123423143465 is 564341324321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564341324321 = 34613 ⋅16304317.

It can be written as a sum of positive squares in 2 ways, for example, as 75596952601 + 47826190864 = 274949^2 + 218692^2 .

It is a cyclic number.

It is not a de Polignac number, because 123423143465 - 2⁸ = 123423143209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12342314342 + ... + 12342314351.

It is an arithmetic number, because the mean of its divisors is an integer number (37026943041).

Almost surely, 2^123423143465 is an apocalyptic number.

It is an amenable number.

123423143465 is a deficient number, since it is larger than the sum of its proper divisors (24684628699).

123423143465 is an equidigital number, since it uses as much as digits as its factorization.

123423143465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24684628698.

The product of its digits is 207360, while the sum is 38.

Adding to 123423143465 its reverse (564341324321), we get a palindrome (687764467786).

The spelling of 123423143465 in words is "one hundred twenty-three billion, four hundred twenty-three million, one hundred forty-three thousand, four hundred sixty-five".