13669 has 2 divisors, whose sum is σ = 13670. Its totient is φ = 13668.

The previous prime is 13649. The next prime is 13679. The reversal of 13669 is 96631.

13669 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12769 + 900 = 113^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 13669 - 2¹¹ = 11621 is a prime.

It is a super-2 number, since 2×13669² = 373683122, which contains 22 as substring.

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 (13619) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6834 + 6835.

It is an arithmetic number, because the mean of its divisors is an integer number (6835).

2¹³⁶⁶⁹ is an apocalyptic number.

13669 is the 68-th hex number.

It is an amenable number.

13669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13669 is an equidigital number, since it uses as much as digits as its factorization.

13669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 25.

The square root of 13669 is about 116.9144986732. The cubic root of 13669 is about 23.9099635751.

Adding to 13669 its product of digits (972), we get a palindrome (14641).

The spelling of 13669 in words is "thirteen thousand, six hundred sixty-nine".