16917 has 4 divisors (see below), whose sum is σ = 22560. Its totient is φ = 11276.

The previous prime is 16903. The next prime is 16921. The reversal of 16917 is 71961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16917 - 2⁴ = 16901 is a prime.

It is an Ulam number.

It is a D-number.

16917 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817 + ... + 2822.

It is an arithmetic number, because the mean of its divisors is an integer number (5640).

2¹⁶⁹¹⁷ is an apocalyptic number.

It is an amenable number.

16917 is a deficient number, since it is larger than the sum of its proper divisors (5643).

16917 is an equidigital number, since it uses as much as digits as its factorization.

16917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642.

The product of its digits is 378, while the sum is 24.

The square root of 16917 is about 130.0653681808. The cubic root of 16917 is about 25.6709012709.

The spelling of 16917 in words is "sixteen thousand, nine hundred seventeen".