89689109 has 2 divisors, whose sum is σ = 89689110. Its totient is φ = 89689108.

The previous prime is 89689087. The next prime is 89689151. The reversal of 89689109 is 90198698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48344209 + 41344900 = 6953^2 + 6430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89689109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89689009) 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 as a sum of consecutive naturals, namely, 44844554 + 44844555.

It is an arithmetic number, because the mean of its divisors is an integer number (44844555).

Almost surely, 2^89689109 is an apocalyptic number.

It is an amenable number.

89689109 is a deficient number, since it is larger than the sum of its proper divisors (1).

89689109 is an equidigital number, since it uses as much as digits as its factorization.

89689109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 89689109 is about 9470.4334114126. The cubic root of 89689109 is about 447.6238688338.

It can be divided in two parts, 89689 and 109, that added together give a palindrome (89798).

The spelling of 89689109 in words is "eighty-nine million, six hundred eighty-nine thousand, one hundred nine".