13888669 has 2 divisors, whose sum is σ = 13888670. Its totient is φ = 13888668.

The previous prime is 13888607. The next prime is 13888723. The reversal of 13888669 is 96688831.

13888669 is digitally balanced in base 3, 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., 10484644 + 3404025 = 3238^2 + 1845^2 .

It is an emirp because it is prime and its reverse (96688831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13888669 - 2²¹ = 11791517 is a prime.

It is a super-2 number, since 2×13888669² = 385790253183122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13888769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944334 + 6944335.

It is an arithmetic number, because the mean of its divisors is an integer number (6944335).

Almost surely, 2^13888669 is an apocalyptic number.

It is an amenable number.

13888669 is a deficient number, since it is larger than the sum of its proper divisors (1).

13888669 is an equidigital number, since it uses as much as digits as its factorization.

13888669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 13888669 is about 3726.7504611927. The cubic root of 13888669 is about 240.3736598393.

The spelling of 13888669 in words is "thirteen million, eight hundred eighty-eight thousand, six hundred sixty-nine".