5891441981 has 2 divisors, whose sum is σ = 5891441982. Its totient is φ = 5891441980.

The previous prime is 5891441977. The next prime is 5891442013. The reversal of 5891441981 is 1891441985.

5891441981 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., 5471560900 + 419881081 = 73970^2 + 20491^2 .

It is a cyclic number.

It is not a de Polignac number, because 5891441981 - 2² = 5891441977 is a prime.

It is a super-2 number, since 2×5891441981² = 69418177230978408722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5891441921) 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, 2945720990 + 2945720991.

It is an arithmetic number, because the mean of its divisors is an integer number (2945720991).

Almost surely, 2^5891441981 is an apocalyptic number.

It is an amenable number.

5891441981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5891441981 is an equidigital number, since it uses as much as digits as its factorization.

5891441981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 50.

The square root of 5891441981 is about 76755.7293040721. The cubic root of 5891441981 is about 1806.0947700620.

The spelling of 5891441981 in words is "five billion, eight hundred ninety-one million, four hundred forty-one thousand, nine hundred eighty-one".