16539943 has 8 divisors (see below), whose sum is σ = 18974720. Its totient is φ = 14123160.

The previous prime is 16539871. The next prime is 16539959. The reversal of 16539943 is 34993561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16539943 - 2¹³ = 16531751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16539896 and 16539905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539973) 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 7 ways as a sum of consecutive naturals, for example, 2463 + ... + 6256.

It is an arithmetic number, because the mean of its divisors is an integer number (2371840).

Almost surely, 2^16539943 is an apocalyptic number.

16539943 is a deficient number, since it is larger than the sum of its proper divisors (2434777).

16539943 is an equidigital number, since it uses as much as digits as its factorization.

16539943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8997.

The product of its digits is 87480, while the sum is 40.

The square root of 16539943 is about 4066.9328738006. The cubic root of 16539943 is about 254.7874327474.

The spelling of 16539943 in words is "sixteen million, five hundred thirty-nine thousand, nine hundred forty-three".