16643323 has 8 divisors (see below), whose sum is σ = 17871840. Its totient is φ = 15442560.

The previous prime is 16643309. The next prime is 16643339. The reversal of 16643323 is 32334661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16643323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16643291 and 16643300.

It is not an unprimeable number, because it can be changed into a prime (16643353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5688 + ... + 8101.

It is an arithmetic number, because the mean of its divisors is an integer number (2233980).

Almost surely, 2^16643323 is an apocalyptic number.

16643323 is a deficient number, since it is larger than the sum of its proper divisors (1228517).

16643323 is a wasteful number, since it uses less digits than its factorization.

16643323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13877.

The product of its digits is 7776, while the sum is 28.

The square root of 16643323 is about 4079.6228992396. The cubic root of 16643323 is about 255.3171652638.

Adding to 16643323 its reverse (32334661), we get a palindrome (48977984).

The spelling of 16643323 in words is "sixteen million, six hundred forty-three thousand, three hundred twenty-three".