123243133 has 6 divisors (see below), whose sum is σ = 132766494. Its totient is φ = 113725944.

The previous prime is 123243103. The next prime is 123243151. The reversal of 123243133 is 331342321.

It can be written as a sum of positive squares in only one way, i.e., 85322169 + 37920964 = 9237^2 + 6158^2 .

It is not a de Polignac number, because 123243133 - 2²⁵ = 89688701 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 (123243103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38488 + ... + 41566.

It is an arithmetic number, because the mean of its divisors is an integer number (22127749).

Almost surely, 2^123243133 is an apocalyptic number.

123243133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123243133 is a deficient number, since it is larger than the sum of its proper divisors (9523361).

123243133 is an frugal number, since it uses more digits than its factorization.

123243133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171 (or 3092 counting only the distinct ones).

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

The square root of 123243133 is about 11101.4923771536. The cubic root of 123243133 is about 497.6464496506.

Adding to 123243133 its reverse (331342321), we get a palindrome (454585454).

The spelling of 123243133 in words is "one hundred twenty-three million, two hundred forty-three thousand, one hundred thirty-three".