133243123 has 4 divisors (see below), whose sum is σ = 143492608. Its totient is φ = 122993640.

The previous prime is 133243091. The next prime is 133243129. The reversal of 133243123 is 321342331.

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 133243123 - 2⁵ = 133243091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133243094 and 133243103.

It is not an unprimeable number, because it can be changed into a prime (133243129) 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, 5124723 + ... + 5124748.

It is an arithmetic number, because the mean of its divisors is an integer number (35873152).

Almost surely, 2^133243123 is an apocalyptic number.

133243123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133243123 is a deficient number, since it is larger than the sum of its proper divisors (10249485).

133243123 is a wasteful number, since it uses less digits than its factorization.

133243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249484.

The product of its digits is 1296, while the sum is 22.

The square root of 133243123 is about 11543.0985008359. The cubic root of 133243123 is about 510.7577138864.

Adding to 133243123 its reverse (321342331), we get a palindrome (454585454).

The spelling of 133243123 in words is "one hundred thirty-three million, two hundred forty-three thousand, one hundred twenty-three".