23669 has 2 divisors, whose sum is σ = 23670.
Its totient is φ = 23668.
The previous prime is 23663. The next prime is 23671. The reversal of 23669 is 96632.
23669 is nontrivially palindromic in base 8.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 18769 + 4900 = 137^2 + 70^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-23669 is a prime.
It is a super-2 number, since 2×236692 = 1120443122, which contains 22 as substring.
It is a Sophie Germain prime.
Together with 23671, it forms a pair of twin primes.
It is a Chen prime.
It is a Curzon number.
It is a plaindrome in base 10.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (23663) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11834 + 11835.
It is an arithmetic number, because the mean of its divisors is an integer number (11835).
223669 is an apocalyptic number.
It is an amenable number.
23669 is a deficient number, since it is larger than the sum of its proper divisors (1).
23669 is an equidigital number, since it uses as much as digits as its factorization.
23669 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1944, while the sum is 26.
The square root of 23669 is about 153.8473269186.
The cubic root of 23669 is about 28.7117702332.
The spelling of 23669 in words is "twenty-three thousand, six hundred sixty-nine".