123131543 has 2 divisors, whose sum is σ = 123131544. Its totient is φ = 123131542.

The previous prime is 123131531. The next prime is 123131551. The reversal of 123131543 is 345131321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123131543 - 2¹⁰ = 123130519 is a prime.

It is a super-2 number, since 2×123131543² = 30322753763121698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123131513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565771 + 61565772.

It is an arithmetic number, because the mean of its divisors is an integer number (61565772).

Almost surely, 2^123131543 is an apocalyptic number.

123131543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131543 is an equidigital number, since it uses as much as digits as its factorization.

123131543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 23.

The square root of 123131543 is about 11096.4653381156. The cubic root of 123131543 is about 497.4962069692.

Adding to 123131543 its reverse (345131321), we get a palindrome (468262864).

The spelling of 123131543 in words is "one hundred twenty-three million, one hundred thirty-one thousand, five hundred forty-three".