8169 has 8 divisors (see below), whose sum is σ = 12480. Its totient is φ = 4656.

The previous prime is 8167. The next prime is 8171. The reversal of 8169 is 9618.

8169 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8167) and next prime (8171).

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

It is not a de Polignac number, because 8169 - 2¹ = 8167 is a prime.

It is a super-2 number, since 2×8169² = 133465122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

8169 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 215.

It is an arithmetic number, because the mean of its divisors is an integer number (1560).

2⁸¹⁶⁹ is an apocalyptic number.

It is an amenable number.

8169 is a deficient number, since it is larger than the sum of its proper divisors (4311).

8169 is a wasteful number, since it uses less digits than its factorization.

8169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 432, while the sum is 24.

The square root of 8169 is about 90.3825204340. The cubic root of 8169 is about 20.1398531092.

The spelling of 8169 in words is "eight thousand, one hundred sixty-nine".