16197 has 4 divisors (see below), whose sum is σ = 21600. Its totient is φ = 10796.

The previous prime is 16193. The next prime is 16217. The reversal of 16197 is 79161.

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: 79161 = 3 ⋅26387.

It is a cyclic number.

It is not a de Polignac number, because 16197 - 2² = 16193 is a prime.

It is a D-number.

16197 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16193) 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, 2697 + ... + 2702.

It is an arithmetic number, because the mean of its divisors is an integer number (5400).

2¹⁶¹⁹⁷ is an apocalyptic number.

It is an amenable number.

16197 is a deficient number, since it is larger than the sum of its proper divisors (5403).

16197 is an equidigital number, since it uses as much as digits as its factorization.

16197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402.

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

The square root of 16197 is about 127.2674349549. The cubic root of 16197 is about 25.3014179503.

The spelling of 16197 in words is "sixteen thousand, one hundred ninety-seven".