1052443981 has 2 divisors, whose sum is σ = 1052443982. Its totient is φ = 1052443980.

The previous prime is 1052443969. The next prime is 1052443999. The reversal of 1052443981 is 1893442501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1046846025 + 5597956 = 32355^2 + 2366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052443981 - 2²⁵ = 1018889549 is a prime.

It is a super-2 number, since 2×1052443981² = 2215276666286256722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1052443981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1052453981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526221990 + 526221991.

It is an arithmetic number, because the mean of its divisors is an integer number (526221991).

Almost surely, 2^1052443981 is an apocalyptic number.

It is an amenable number.

1052443981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1052443981 is an equidigital number, since it uses as much as digits as its factorization.

1052443981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1052443981 is about 32441.3930187962. The cubic root of 1052443981 is about 1017.1843341412.

The spelling of 1052443981 in words is "one billion, fifty-two million, four hundred forty-three thousand, nine hundred eighty-one".