84190986889 has 2 divisors, whose sum is σ = 84190986890. Its totient is φ = 84190986888.

The previous prime is 84190986877. The next prime is 84190986941. The reversal of 84190986889 is 98868909148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81072881289 + 3118105600 = 284733^2 + 55840^2 .

It is a cyclic number.

It is not a de Polignac number, because 84190986889 - 2⁹ = 84190986377 is a prime.

It is not a weakly prime, because it can be changed into another prime (84190986829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42095493444 + 42095493445.

It is an arithmetic number, because the mean of its divisors is an integer number (42095493445).

Almost surely, 2^84190986889 is an apocalyptic number.

It is an amenable number.

84190986889 is a deficient number, since it is larger than the sum of its proper divisors (1).

84190986889 is an equidigital number, since it uses as much as digits as its factorization.

84190986889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71663616, while the sum is 70.

The spelling of 84190986889 in words is "eighty-four billion, one hundred ninety million, nine hundred eighty-six thousand, eight hundred eighty-nine".