89689 has 2 divisors, whose sum is σ = 89690. Its totient is φ = 89688.

The previous prime is 89681. The next prime is 89753. The reversal of 89689 is 98698.

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., 81225 + 8464 = 285^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 89689 - 2³ = 89681 is a prime.

It is not a weakly prime, because it can be changed into another prime (89681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44844 + 44845.

It is an arithmetic number, because the mean of its divisors is an integer number (44845).

2⁸⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

89689 is a deficient number, since it is larger than the sum of its proper divisors (1).

89689 is an equidigital number, since it uses as much as digits as its factorization.

89689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The square root of 89689 is about 299.4812181089. The cubic root of 89689 is about 44.7623687500.

Subtracting from 89689 its product of digits (31104), we obtain a palindrome (58585).

Subtracting 89689 from its reverse (98698), we obtain a palindrome (9009).

The spelling of 89689 in words is "eighty-nine thousand, six hundred eighty-nine".