123343355533 has 4 divisors (see below), whose sum is σ = 123365164860. Its totient is φ = 123321546208.

The previous prime is 123343355459. The next prime is 123343355537. The reversal of 123343355533 is 335553343321.

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 9378372964 + 113964982569 = 96842^2 + 337587^2 .

It is a cyclic number.

It is not a de Polignac number, because 123343355533 - 2⁹ = 123343355021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123343355537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10896178 + ... + 10907491.

It is an arithmetic number, because the mean of its divisors is an integer number (30841291215).

Almost surely, 2^123343355533 is an apocalyptic number.

It is an amenable number.

123343355533 is a deficient number, since it is larger than the sum of its proper divisors (21809327).

123343355533 is an equidigital number, since it uses as much as digits as its factorization.

123343355533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21809326.

The product of its digits is 729000, while the sum is 40.

Adding to 123343355533 its reverse (335553343321), we get a palindrome (458896698854).

The spelling of 123343355533 in words is "one hundred twenty-three billion, three hundred forty-three million, three hundred fifty-five thousand, five hundred thirty-three".