11923543 has 2 divisors, whose sum is σ = 11923544. Its totient is φ = 11923542.

The previous prime is 11923529. The next prime is 11923603. The reversal of 11923543 is 34532911.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11923543 is a prime.

It is equal to p₇₈₃₃₅₂ and since 11923543 and 783352 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11923643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5961771 + 5961772.

It is an arithmetic number, because the mean of its divisors is an integer number (5961772).

Almost surely, 2^11923543 is an apocalyptic number.

11923543 is a deficient number, since it is larger than the sum of its proper divisors (1).

11923543 is an equidigital number, since it uses as much as digits as its factorization.

11923543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 11923543 is about 3453.0483634030. The cubic root of 11923543 is about 228.4555820880.

The spelling of 11923543 in words is "eleven million, nine hundred twenty-three thousand, five hundred forty-three".