13888387 has 2 divisors, whose sum is σ = 13888388. Its totient is φ = 13888386.

The previous prime is 13888379. The next prime is 13888393. The reversal of 13888387 is 78388831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13888387 - 2³ = 13888379 is a prime.

It is not a weakly prime, because it can be changed into another prime (13888367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944193 + 6944194.

It is an arithmetic number, because the mean of its divisors is an integer number (6944194).

Almost surely, 2^13888387 is an apocalyptic number.

13888387 is a deficient number, since it is larger than the sum of its proper divisors (1).

13888387 is an equidigital number, since it uses as much as digits as its factorization.

13888387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 13888387 is about 3726.7126264310. The cubic root of 13888387 is about 240.3720329536.

The spelling of 13888387 in words is "thirteen million, eight hundred eighty-eight thousand, three hundred eighty-seven".