13944481 has 2 divisors, whose sum is σ = 13944482. Its totient is φ = 13944480.

The previous prime is 13944439. The next prime is 13944503. The reversal of 13944481 is 18444931.

13944481 = 2640² + 2641².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 6969600 = 2641^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 13944481 - 2¹¹ = 13942433 is a prime.

It is a super-2 number, since 2×13944481² = 388897100718722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13944401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6972240 + 6972241.

It is an arithmetic number, because the mean of its divisors is an integer number (6972241).

Almost surely, 2^13944481 is an apocalyptic number.

13944481 is the 2641-st centered square number.

It is an amenable number.

13944481 is a deficient number, since it is larger than the sum of its proper divisors (1).

13944481 is an equidigital number, since it uses as much as digits as its factorization.

13944481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 13944481 is about 3734.2309783943. The cubic root of 13944481 is about 240.6952122312.

The spelling of 13944481 in words is "thirteen million, nine hundred forty-four thousand, four hundred eighty-one".