16543123 has 4 divisors (see below), whose sum is σ = 16564048. Its totient is φ = 16522200.

The previous prime is 16543117. The next prime is 16543151. The reversal of 16543123 is 32134561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32134561 = 107 ⋅300323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16543123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16543103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9228 + ... + 10873.

It is an arithmetic number, because the mean of its divisors is an integer number (4141012).

Almost surely, 2^16543123 is an apocalyptic number.

16543123 is a deficient number, since it is larger than the sum of its proper divisors (20925).

16543123 is an equidigital number, since it uses as much as digits as its factorization.

16543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20924.

The product of its digits is 2160, while the sum is 25.

The square root of 16543123 is about 4067.3238130250. The cubic root of 16543123 is about 254.8037603353.

Adding to 16543123 its reverse (32134561), we get a palindrome (48677684).

The spelling of 16543123 in words is "sixteen million, five hundred forty-three thousand, one hundred twenty-three".