13443961 has 2 divisors, whose sum is σ = 13443962. Its totient is φ = 13443960.

The previous prime is 13443959. The next prime is 13443977. The reversal of 13443961 is 16934431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 1610361 = 3440^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 13443961 - 2¹ = 13443959 is a prime.

Together with 13443959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13443161) 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, 6721980 + 6721981.

It is an arithmetic number, because the mean of its divisors is an integer number (6721981).

Almost surely, 2^13443961 is an apocalyptic number.

It is an amenable number.

13443961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13443961 is an equidigital number, since it uses as much as digits as its factorization.

13443961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 13443961 is about 3666.6007418316. The cubic root of 13443961 is about 237.7802328350.

The spelling of 13443961 in words is "thirteen million, four hundred forty-three thousand, nine hundred sixty-one".