16997 has 4 divisors (see below), whose sum is σ = 17760. Its totient is φ = 16236.

The previous prime is 16993. The next prime is 17011. The reversal of 16997 is 79961.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79961 = 7 ⋅11423.

It is a cyclic number.

It is not a de Polignac number, because 16997 - 2² = 16993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 16997.

It is not an unprimeable number, because it can be changed into a prime (16993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347 + ... + 392.

It is an arithmetic number, because the mean of its divisors is an integer number (4440).

2¹⁶⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

16997 is a deficient number, since it is larger than the sum of its proper divisors (763).

16997 is an equidigital number, since it uses as much as digits as its factorization.

16997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its digits is 3402, while the sum is 32.

The square root of 16997 is about 130.3725431216. The cubic root of 16997 is about 25.7113032990.

The spelling of 16997 in words is "sixteen thousand, nine hundred ninety-seven".