84808012889 has 2 divisors, whose sum is σ = 84808012890. Its totient is φ = 84808012888.

The previous prime is 84808012859. The next prime is 84808012973. The reversal of 84808012889 is 98821080848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80018265625 + 4789747264 = 282875^2 + 69208^2 .

It is a cyclic number.

It is not a de Polignac number, because 84808012889 - 2²⁰ = 84806964313 is a prime.

It is not a weakly prime, because it can be changed into another prime (84808012859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42404006444 + 42404006445.

It is an arithmetic number, because the mean of its divisors is an integer number (42404006445).

Almost surely, 2^84808012889 is an apocalyptic number.

It is an amenable number.

84808012889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84808012889 is an equidigital number, since it uses as much as digits as its factorization.

84808012889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2359296, while the sum is 56.

The spelling of 84808012889 in words is "eighty-four billion, eight hundred eight million, twelve thousand, eight hundred eighty-nine".