84485391889 has 2 divisors, whose sum is σ = 84485391890. Its totient is φ = 84485391888.

The previous prime is 84485391883. The next prime is 84485391917. The reversal of 84485391889 is 98819358448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60115684225 + 24369707664 = 245185^2 + 156108^2 .

It is a cyclic number.

It is not a de Polignac number, because 84485391889 - 2⁵ = 84485391857 is a prime.

It is not a weakly prime, because it can be changed into another prime (84485391883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42242695944 + 42242695945.

It is an arithmetic number, because the mean of its divisors is an integer number (42242695945).

Almost surely, 2^84485391889 is an apocalyptic number.

It is an amenable number.

84485391889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84485391889 is an equidigital number, since it uses as much as digits as its factorization.

84485391889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79626240, while the sum is 67.

The spelling of 84485391889 in words is "eighty-four billion, four hundred eighty-five million, three hundred ninety-one thousand, eight hundred eighty-nine".