5433971981 has 2 divisors, whose sum is σ = 5433971982. Its totient is φ = 5433971980.

The previous prime is 5433971971. The next prime is 5433971993. The reversal of 5433971981 is 1891793345.

5433971981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5433901225 + 70756 = 73715^2 + 266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5433971981 is a prime.

It is a super-3 number, since 3×5433971981³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5433971951) 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, 2716985990 + 2716985991.

It is an arithmetic number, because the mean of its divisors is an integer number (2716985991).

Almost surely, 2^5433971981 is an apocalyptic number.

It is an amenable number.

5433971981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5433971981 is an equidigital number, since it uses as much as digits as its factorization.

5433971981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 5433971981 is about 73715.4799278957. The cubic root of 5433971981 is about 1758.0820166937.

The spelling of 5433971981 in words is "five billion, four hundred thirty-three million, nine hundred seventy-one thousand, nine hundred eighty-one".