8669 has 2 divisors, whose sum is σ = 8670. Its totient is φ = 8668.

The previous prime is 8663. The next prime is 8677. The reversal of 8669 is 9668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7225 + 1444 = 85^2 + 38^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8669 is a prime.

It is a super-2 number, since 2×8669² = 150303122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4334 + 4335.

It is an arithmetic number, because the mean of its divisors is an integer number (4335).

2⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

8669 is a deficient number, since it is larger than the sum of its proper divisors (1).

8669 is an equidigital number, since it uses as much as digits as its factorization.

8669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 8669 is about 93.1074647920. The cubic root of 8669 is about 20.5426437323.

Subtracting 8669 from its reverse (9668), we obtain a palindrome (999).

The spelling of 8669 in words is "eight thousand, six hundred sixty-nine".