13889669 has 2 divisors, whose sum is σ = 13889670. Its totient is φ = 13889668.

The previous prime is 13889647. The next prime is 13889671. The reversal of 13889669 is 96698831.

13889669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9424900 + 4464769 = 3070^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 13889669 - 2⁸ = 13889413 is a prime.

It is a super-2 number, since 2×13889669² = 385845809859122, which contains 22 as substring.

Together with 13889671, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13889269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944834 + 6944835.

It is an arithmetic number, because the mean of its divisors is an integer number (6944835).

Almost surely, 2^13889669 is an apocalyptic number.

It is an amenable number.

13889669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13889669 is an equidigital number, since it uses as much as digits as its factorization.

13889669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 13889669 is about 3726.8846239185. The cubic root of 13889669 is about 240.3794287600.

The spelling of 13889669 in words is "thirteen million, eight hundred eighty-nine thousand, six hundred sixty-nine".