123440344033 has 4 divisors (see below), whose sum is σ = 124341368580. Its totient is φ = 122539319488.

The previous prime is 123440344021. The next prime is 123440344057. The reversal of 123440344033 is 330443044321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42589402384 + 80850941649 = 206372^2 + 284343^2 .

It is a cyclic number.

It is not a de Polignac number, because 123440344033 - 2²⁵ = 123406789601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123440343986 and 123440344004.

It is not an unprimeable number, because it can be changed into a prime (123440344133) 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, 450512068 + ... + 450512341.

It is an arithmetic number, because the mean of its divisors is an integer number (31085342145).

Almost surely, 2^123440344033 is an apocalyptic number.

It is an amenable number.

123440344033 is a deficient number, since it is larger than the sum of its proper divisors (901024547).

123440344033 is an equidigital number, since it uses as much as digits as its factorization.

123440344033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901024546.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 123440344033 its reverse (330443044321), we get a palindrome (453883388354).

The spelling of 123440344033 in words is "one hundred twenty-three billion, four hundred forty million, three hundred forty-four thousand, thirty-three".