13859887 has 2 divisors, whose sum is σ = 13859888. Its totient is φ = 13859886.

The previous prime is 13859863. The next prime is 13859899. The reversal of 13859887 is 78895831.

13859887 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 is a cyclic number.

It is not a de Polignac number, because 13859887 - 2¹⁵ = 13827119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13859887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13859827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6929943 + 6929944.

It is an arithmetic number, because the mean of its divisors is an integer number (6929944).

Almost surely, 2^13859887 is an apocalyptic number.

13859887 is a deficient number, since it is larger than the sum of its proper divisors (1).

13859887 is an equidigital number, since it uses as much as digits as its factorization.

13859887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 49.

The square root of 13859887 is about 3722.8869174338. The cubic root of 13859887 is about 240.2074999455.

It can be divided in two parts, 138 and 59887, that added together give a square (60025 = 245²).

The spelling of 13859887 in words is "thirteen million, eight hundred fifty-nine thousand, eight hundred eighty-seven".