84020089 has 4 divisors (see below), whose sum is σ = 84116340. Its totient is φ = 83923840.

The previous prime is 84020063. The next prime is 84020113. The reversal of 84020089 is 98002048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9715689 + 74304400 = 3117^2 + 8620^2 .

It is a cyclic number.

It is not a de Polignac number, because 84020089 - 2¹⁹ = 83495801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84020089.

It is not an unprimeable number, because it can be changed into a prime (84020009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46804 + ... + 48565.

It is an arithmetic number, because the mean of its divisors is an integer number (21029085).

Almost surely, 2^84020089 is an apocalyptic number.

It is an amenable number.

84020089 is a deficient number, since it is larger than the sum of its proper divisors (96251).

84020089 is an equidigital number, since it uses as much as digits as its factorization.

84020089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96250.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 84020089 is about 9166.2472691936. The cubic root of 84020089 is about 437.9868239679.

The spelling of 84020089 in words is "eighty-four million, twenty thousand, eighty-nine".