13878719 has 2 divisors, whose sum is σ = 13878720. Its totient is φ = 13878718.

The previous prime is 13878707. The next prime is 13878743. The reversal of 13878719 is 91787831.

13878719 is nontrivially palindromic in base 14.

It is a weak prime.

It is an emirp because it is prime and its reverse (91787831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13878719 - 2⁸ = 13878463 is a prime.

It is a super-2 number, since 2×13878719² = 385237682161922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13878719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13878779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939359 + 6939360.

It is an arithmetic number, because the mean of its divisors is an integer number (6939360).

Almost surely, 2^13878719 is an apocalyptic number.

13878719 is a deficient number, since it is larger than the sum of its proper divisors (1).

13878719 is an equidigital number, since it uses as much as digits as its factorization.

13878719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 44.

The square root of 13878719 is about 3725.4152788649. The cubic root of 13878719 is about 240.3162439872.

The spelling of 13878719 in words is "thirteen million, eight hundred seventy-eight thousand, seven hundred nineteen".