9989807 has 2 divisors, whose sum is σ = 9989808. Its totient is φ = 9989806.

The previous prime is 9989779. The next prime is 9989813. The reversal of 9989807 is 7089899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9989807 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 (9989827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994903 + 4994904.

It is an arithmetic number, because the mean of its divisors is an integer number (4994904).

Almost surely, 2^9989807 is an apocalyptic number.

9989807 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989807 is an equidigital number, since it uses as much as digits as its factorization.

9989807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 9989807 is about 3160.6655944595. The cubic root of 9989807 is about 215.3702436087.

The spelling of 9989807 in words is "nine million, nine hundred eighty-nine thousand, eight hundred seven".