13887569 has 2 divisors, whose sum is σ = 13887570. Its totient is φ = 13887568.

The previous prime is 13887563. The next prime is 13887571. The reversal of 13887569 is 96578831.

It is a happy number.

13887569 is digitally balanced in base 2 and base 3, because in such bases 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., 13601344 + 286225 = 3688^2 + 535^2 .

It is an emirp because it is prime and its reverse (96578831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13887569 - 2²⁰ = 12838993 is a prime.

It is a super-2 number, since 2×13887569² = 385729145459522, which contains 22 as substring.

Together with 13887571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13887563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6943784 + 6943785.

It is an arithmetic number, because the mean of its divisors is an integer number (6943785).

Almost surely, 2^13887569 is an apocalyptic number.

It is an amenable number.

13887569 is a deficient number, since it is larger than the sum of its proper divisors (1).

13887569 is an equidigital number, since it uses as much as digits as its factorization.

13887569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 13887569 is about 3726.6028766156. The cubic root of 13887569 is about 240.3673137066.

The spelling of 13887569 in words is "thirteen million, eight hundred eighty-seven thousand, five hundred sixty-nine".