84043396487081 has 2 divisors, whose sum is σ = 84043396487082. Its totient is φ = 84043396487080.

The previous prime is 84043396487059. The next prime is 84043396487087. The reversal of 84043396487081 is 18078469334048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74649686400025 + 9393710087056 = 8640005^2 + 3064916^2 .

It is a cyclic number.

It is not a de Polignac number, because 84043396487081 - 2²² = 84043392292777 is a prime.

It is a super-2 number, since 2×84043396487081² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84043396486999 and 84043396487017.

It is not a weakly prime, because it can be changed into another prime (84043396487087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42021698243540 + 42021698243541.

It is an arithmetic number, because the mean of its divisors is an integer number (42021698243541).

Almost surely, 2^{84043396487081} is an apocalyptic number.

It is an amenable number.

84043396487081 is a deficient number, since it is larger than the sum of its proper divisors (1).

84043396487081 is an equidigital number, since it uses as much as digits as its factorization.

84043396487081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111476736, while the sum is 65.

The spelling of 84043396487081 in words is "eighty-four trillion, forty-three billion, three hundred ninety-six million, four hundred eighty-seven thousand, eighty-one".