13881871 has 2 divisors, whose sum is σ = 13881872. Its totient is φ = 13881870.

The previous prime is 13881853. The next prime is 13881943. The reversal of 13881871 is 17818831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13881871 - 2⁵ = 13881839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13881871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13881671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940935 + 6940936.

It is an arithmetic number, because the mean of its divisors is an integer number (6940936).

Almost surely, 2^13881871 is an apocalyptic number.

13881871 is a deficient number, since it is larger than the sum of its proper divisors (1).

13881871 is an equidigital number, since it uses as much as digits as its factorization.

13881871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 37.

The square root of 13881871 is about 3725.8382949344. The cubic root of 13881871 is about 240.3344353747.

The spelling of 13881871 in words is "thirteen million, eight hundred eighty-one thousand, eight hundred seventy-one".