123443020434403 has 4 divisors (see below), whose sum is σ = 123443335590120. Its totient is φ = 123442705278688.

The previous prime is 123443020434389. The next prime is 123443020434463. The reversal of 123443020434403 is 304434020344321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123443020434403 - 2¹³ = 123443020426211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123443020434463) 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, 156989593 + ... + 157773946.

It is an arithmetic number, because the mean of its divisors is an integer number (30860833897530).

Almost surely, 2^{123443020434403} is an apocalyptic number.

123443020434403 is a deficient number, since it is larger than the sum of its proper divisors (315155717).

123443020434403 is an equidigital number, since it uses as much as digits as its factorization.

123443020434403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315155716.

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 123443020434403 its reverse (304434020344321), we get a palindrome (427877040778724).

The spelling of 123443020434403 in words is "one hundred twenty-three trillion, four hundred forty-three billion, twenty million, four hundred thirty-four thousand, four hundred three".