89820089 has 2 divisors, whose sum is σ = 89820090. Its totient is φ = 89820088.

The previous prime is 89820079. The next prime is 89820091. The reversal of 89820089 is 98002898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82664464 + 7155625 = 9092^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 89820089 - 2⁸ = 89819833 is a prime.

Together with 89820091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89820079) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44910044 + 44910045.

It is an arithmetic number, because the mean of its divisors is an integer number (44910045).

Almost surely, 2^89820089 is an apocalyptic number.

It is an amenable number.

89820089 is a deficient number, since it is larger than the sum of its proper divisors (1).

89820089 is an equidigital number, since it uses as much as digits as its factorization.

89820089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 89820089 is about 9477.3460947672. The cubic root of 89820089 is about 447.8416628618.

The spelling of 89820089 in words is "eighty-nine million, eight hundred twenty thousand, eighty-nine".