123530543 has 2 divisors, whose sum is σ = 123530544. Its totient is φ = 123530542.

The previous prime is 123530521. The next prime is 123530549. The reversal of 123530543 is 345035321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123530543 - 2⁶ = 123530479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123530549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61765271 + 61765272.

It is an arithmetic number, because the mean of its divisors is an integer number (61765272).

Almost surely, 2^123530543 is an apocalyptic number.

123530543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123530543 is an equidigital number, since it uses as much as digits as its factorization.

123530543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 123530543 is about 11114.4294950303. The cubic root of 123530543 is about 498.0329959374.

Adding to 123530543 its reverse (345035321), we get a palindrome (468565864).

The spelling of 123530543 in words is "one hundred twenty-three million, five hundred thirty thousand, five hundred forty-three".