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9689 is a prime number
BaseRepresentation
bin10010111011001
3111021212
42113121
5302224
6112505
740151
oct22731
914255
109689
117309
125735
134544
143761
152d0e
hex25d9

9689 has 2 divisors, whose sum is σ = 9690. Its totient is φ = 9688.

The previous prime is 9679. The next prime is 9697. The reversal of 9689 is 9869.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8464 + 1225 = 92^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 9689 - 28 = 9433 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4844 + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (4845).

29689 is an apocalyptic number.

It is an amenable number.

9689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9689 is an equidigital number, since it uses as much as digits as its factorization.

9689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 9689 is about 98.4327181378. The cubic root of 9689 is about 21.3186476619.

The spelling of 9689 in words is "nine thousand, six hundred eighty-nine".