89784058789 has 2 divisors, whose sum is σ = 89784058790. Its totient is φ = 89784058788.

The previous prime is 89784058787. The next prime is 89784058799. The reversal of 89784058789 is 98785048798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81390384100 + 8393674689 = 285290^2 + 91617^2 .

It is a cyclic number.

It is not a de Polignac number, because 89784058789 - 2¹ = 89784058787 is a prime.

It is a super-2 number, since 2×89784058789² (a number of 23 digits) contains 22 as substring.

Together with 89784058787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89784058787) 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, 44892029394 + 44892029395.

It is an arithmetic number, because the mean of its divisors is an integer number (44892029395).

Almost surely, 2^89784058789 is an apocalyptic number.

It is an amenable number.

89784058789 is a deficient number, since it is larger than the sum of its proper divisors (1).

89784058789 is an equidigital number, since it uses as much as digits as its factorization.

89784058789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 325140480, while the sum is 73.

Subtracting 89784058789 from its reverse (98785048798), we obtain a palindrome (9000990009).

The spelling of 89784058789 in words is "eighty-nine billion, seven hundred eighty-four million, fifty-eight thousand, seven hundred eighty-nine".