13887869 has 2 divisors, whose sum is σ = 13887870. Its totient is φ = 13887868.

The previous prime is 13887859. The next prime is 13887871. The reversal of 13887869 is 96878831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 1532644 = 3515^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 13887869 - 2²⁰ = 12839293 is a prime.

It is a super-2 number, since 2×13887869² = 385745810722322, which contains 22 as substring.

Together with 13887871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13887859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6943934 + 6943935.

It is an arithmetic number, because the mean of its divisors is an integer number (6943935).

Almost surely, 2^13887869 is an apocalyptic number.

It is an amenable number.

13887869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13887869 is an equidigital number, since it uses as much as digits as its factorization.

13887869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 13887869 is about 3726.6431275345. The cubic root of 13887869 is about 240.3690445033.

The spelling of 13887869 in words is "thirteen million, eight hundred eighty-seven thousand, eight hundred sixty-nine".