443968381 has 2 divisors, whose sum is σ = 443968382. Its totient is φ = 443968380.

The previous prime is 443968351. The next prime is 443968397. The reversal of 443968381 is 183869344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438232356 + 5736025 = 20934^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 443968381 - 2⁷ = 443968253 is a prime.

It is a super-2 number, since 2×443968381² = 394215846655522322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443968351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221984190 + 221984191.

It is an arithmetic number, because the mean of its divisors is an integer number (221984191).

Almost surely, 2^443968381 is an apocalyptic number.

It is an amenable number.

443968381 is a deficient number, since it is larger than the sum of its proper divisors (1).

443968381 is an equidigital number, since it uses as much as digits as its factorization.

443968381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 46.

The square root of 443968381 is about 21070.5572066806. The cubic root of 443968381 is about 762.8702527206.

The spelling of 443968381 in words is "four hundred forty-three million, nine hundred sixty-eight thousand, three hundred eighty-one".