11723543 has 4 divisors (see below), whose sum is σ = 12625368. Its totient is φ = 10821720.

The previous prime is 11723527. The next prime is 11723573. The reversal of 11723543 is 34532711.

11723543 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34532711 = 1993 ⋅17327.

It is not a de Polignac number, because 11723543 - 2⁴ = 11723527 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 (11723573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450893 + ... + 450918.

It is an arithmetic number, because the mean of its divisors is an integer number (3156342).

Almost surely, 2^11723543 is an apocalyptic number.

11723543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11723543 is a deficient number, since it is larger than the sum of its proper divisors (901825).

11723543 is an equidigital number, since it uses as much as digits as its factorization.

11723543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901824.

The product of its digits is 2520, while the sum is 26.

The square root of 11723543 is about 3423.9659752982. The cubic root of 11723543 is about 227.1710368485.

The spelling of 11723543 in words is "eleven million, seven hundred twenty-three thousand, five hundred forty-three".