16641443 has 16 divisors (see below), whose sum is σ = 21374976. Its totient is φ = 12592800.

The previous prime is 16641439. The next prime is 16641461. The reversal of 16641443 is 34414661.

It is a cyclic number.

It is not a de Polignac number, because 16641443 - 2² = 16641439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16641403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1883 + ... + 6068.

It is an arithmetic number, because the mean of its divisors is an integer number (1335936).

Almost surely, 2^16641443 is an apocalyptic number.

16641443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16641443 is a deficient number, since it is larger than the sum of its proper divisors (4733533).

16641443 is a wasteful number, since it uses less digits than its factorization.

16641443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994.

The product of its digits is 6912, while the sum is 29.

The square root of 16641443 is about 4079.3924792792. The cubic root of 16641443 is about 255.3075515117.

The spelling of 16641443 in words is "sixteen million, six hundred forty-one thousand, four hundred forty-three".