9783989 has 2 divisors, whose sum is σ = 9783990. Its totient is φ = 9783988.

The previous prime is 9783979. The next prime is 9784007. The reversal of 9783989 is 9893879.

9783989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 3179089 = 2570^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 9783989 - 2¹⁶ = 9718453 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9783989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9783929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4891994 + 4891995.

It is an arithmetic number, because the mean of its divisors is an integer number (4891995).

Almost surely, 2^9783989 is an apocalyptic number.

It is an amenable number.

9783989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9783989 is an equidigital number, since it uses as much as digits as its factorization.

9783989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 9783989 is about 3127.9368599766. The cubic root of 9783989 is about 213.8808912984.

The spelling of 9783989 in words is "nine million, seven hundred eighty-three thousand, nine hundred eighty-nine".