13857871 has 2 divisors, whose sum is σ = 13857872. Its totient is φ = 13857870.

The previous prime is 13857841. The next prime is 13857881. The reversal of 13857871 is 17875831.

It is a happy number.

13857871 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 13857871 - 2⁹ = 13857359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13857841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928935 + 6928936.

It is an arithmetic number, because the mean of its divisors is an integer number (6928936).

Almost surely, 2^13857871 is an apocalyptic number.

13857871 is a deficient number, since it is larger than the sum of its proper divisors (1).

13857871 is an equidigital number, since it uses as much as digits as its factorization.

13857871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 40.

The square root of 13857871 is about 3722.6161499677. The cubic root of 13857871 is about 240.1958528616.

The spelling of 13857871 in words is "thirteen million, eight hundred fifty-seven thousand, eight hundred seventy-one".