13853971 has 2 divisors, whose sum is σ = 13853972. Its totient is φ = 13853970.

The previous prime is 13853953. The next prime is 13853977. The reversal of 13853971 is 17935831.

It is a happy number.

13853971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (17935831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13853971 - 2⁹ = 13853459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13853971.

It is not a weakly prime, because it can be changed into another prime (13853977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6926985 + 6926986.

It is an arithmetic number, because the mean of its divisors is an integer number (6926986).

Almost surely, 2^13853971 is an apocalyptic number.

13853971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13853971 is an equidigital number, since it uses as much as digits as its factorization.

13853971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 13853971 is about 3722.0922879477. The cubic root of 13853971 is about 240.1733180937.

It can be divided in two parts, 1385 and 3971, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 13853971 in words is "thirteen million, eight hundred fifty-three thousand, nine hundred seventy-one".