16684417 has 8 divisors (see below), whose sum is σ = 17644032. Its totient is φ = 15751200.

The previous prime is 16684331. The next prime is 16684471. The reversal of 16684417 is 71448661.

It is a happy number.

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 16684417 - 2⁷ = 16684289 is a prime.

It is a super-3 number, since 3×16684417³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16684477) 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, 5293 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (2205504).

Almost surely, 2^16684417 is an apocalyptic number.

It is an amenable number.

16684417 is a deficient number, since it is larger than the sum of its proper divisors (959615).

16684417 is a wasteful number, since it uses less digits than its factorization.

16684417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13199.

The product of its digits is 32256, while the sum is 37.

The square root of 16684417 is about 4084.6562890897. The cubic root of 16684417 is about 255.5271269434.

The spelling of 16684417 in words is "sixteen million, six hundred eighty-four thousand, four hundred seventeen".