13944181 has 2 divisors, whose sum is σ = 13944182. Its totient is φ = 13944180.

The previous prime is 13944179. The next prime is 13944193. The reversal of 13944181 is 18144931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 217156 = 3705^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 13944181 - 2¹ = 13944179 is a prime.

It is a super-2 number, since 2×13944181² = 388880367521522, which contains 22 as substring.

Together with 13944179, it forms a pair of twin primes.

It is equal to p₉₀₆₇₃₆ and since 13944181 and 906736 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13944481) 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, 6972090 + 6972091.

It is an arithmetic number, because the mean of its divisors is an integer number (6972091).

Almost surely, 2^13944181 is an apocalyptic number.

It is an amenable number.

13944181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13944181 is an equidigital number, since it uses as much as digits as its factorization.

13944181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 13944181 is about 3734.1908092651. The cubic root of 13944181 is about 240.6934861223.

The spelling of 13944181 in words is "thirteen million, nine hundred forty-four thousand, one hundred eighty-one".