4444000003981 has 2 divisors, whose sum is σ = 4444000003982. Its totient is φ = 4444000003980.

The previous prime is 4444000003967. The next prime is 4444000004057. The reversal of 4444000003981 is 1893000004444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4259130102756 + 184869901225 = 2063766^2 + 429965^2 .

It is a cyclic number.

It is not a de Polignac number, because 4444000003981 - 2¹⁷ = 4443999872909 is a prime.

It is a super-2 number, since 2×4444000003981² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4444000003981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4444000003901) 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, 2222000001990 + 2222000001991.

It is an arithmetic number, because the mean of its divisors is an integer number (2222000001991).

Almost surely, 2^{4444000003981} is an apocalyptic number.

It is an amenable number.

4444000003981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4444000003981 is an equidigital number, since it uses as much as digits as its factorization.

4444000003981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 4444000003981 in words is "four trillion, four hundred forty-four billion, three thousand, nine hundred eighty-one".