89217247789 has 2 divisors, whose sum is σ = 89217247790. Its totient is φ = 89217247788.

The previous prime is 89217247727. The next prime is 89217247897. The reversal of 89217247789 is 98774271298.

Together with next prime (89217247897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87813246889 + 1404000900 = 296333^2 + 37470^2 .

It is a cyclic number.

It is not a de Polignac number, because 89217247789 - 2⁹ = 89217247277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89217247789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89217247709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44608623894 + 44608623895.

It is an arithmetic number, because the mean of its divisors is an integer number (44608623895).

Almost surely, 2^89217247789 is an apocalyptic number.

It is an amenable number.

89217247789 is a deficient number, since it is larger than the sum of its proper divisors (1).

89217247789 is an equidigital number, since it uses as much as digits as its factorization.

89217247789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28449792, while the sum is 64.

The spelling of 89217247789 in words is "eighty-nine billion, two hundred seventeen million, two hundred forty-seven thousand, seven hundred eighty-nine".