89641789 has 2 divisors, whose sum is σ = 89641790. Its totient is φ = 89641788.

The previous prime is 89641771. The next prime is 89641817. The reversal of 89641789 is 98714698.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87516025 + 2125764 = 9355^2 + 1458^2 .

It is a cyclic number.

It is not a de Polignac number, because 89641789 - 2¹⁵ = 89609021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89611789) 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, 44820894 + 44820895.

It is an arithmetic number, because the mean of its divisors is an integer number (44820895).

Almost surely, 2^89641789 is an apocalyptic number.

It is an amenable number.

89641789 is a deficient number, since it is larger than the sum of its proper divisors (1).

89641789 is an equidigital number, since it uses as much as digits as its factorization.

89641789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 89641789 is about 9467.9347800880. The cubic root of 89641789 is about 447.5451328240.

The spelling of 89641789 in words is "eighty-nine million, six hundred forty-one thousand, seven hundred eighty-nine".