123143444113513 has 4 divisors (see below), whose sum is σ = 123144018426000. Its totient is φ = 123142869801028.

The previous prime is 123143444113493. The next prime is 123143444113549. The reversal of 123143444113513 is 315311444341321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123143444113513 - 2²⁹ = 123142907242601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123143444113913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286834495 + ... + 287263492.

It is an arithmetic number, because the mean of its divisors is an integer number (30786004606500).

Almost surely, 2^{123143444113513} is an apocalyptic number.

It is an amenable number.

123143444113513 is a deficient number, since it is larger than the sum of its proper divisors (574312487).

123143444113513 is an equidigital number, since it uses as much as digits as its factorization.

123143444113513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574312486.

The product of its digits is 207360, while the sum is 40.

Adding to 123143444113513 its reverse (315311444341321), we get a palindrome (438454888454834).

The spelling of 123143444113513 in words is "one hundred twenty-three trillion, one hundred forty-three billion, four hundred forty-four million, one hundred thirteen thousand, five hundred thirteen".