16604943 has 8 divisors (see below), whose sum is σ = 22163328. Its totient is φ = 11058264.

The previous prime is 16604941. The next prime is 16604947. The reversal of 16604943 is 34940661.

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

It is not a de Polignac number, because 16604943 - 2¹ = 16604941 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16604941) 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 7 ways as a sum of consecutive naturals, for example, 1230 + ... + 5892.

It is an arithmetic number, because the mean of its divisors is an integer number (2770416).

Almost surely, 2^16604943 is an apocalyptic number.

16604943 is a deficient number, since it is larger than the sum of its proper divisors (5558385).

16604943 is a wasteful number, since it uses less digits than its factorization.

16604943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 16604943 is about 4074.9163181592. The cubic root of 16604943 is about 255.1207578760.

Adding to 16604943 its product of nonzero digits (15552), we get a triangular number (16620495 = T₅₇₆₅).

The spelling of 16604943 in words is "sixteen million, six hundred four thousand, nine hundred forty-three".