9999984289 has 2 divisors, whose sum is σ = 9999984290. Its totient is φ = 9999984288.

The previous prime is 9999984277. The next prime is 9999984301. The reversal of 9999984289 is 9824899999.

It is a balanced prime because it is at equal distance from previous prime (9999984277) and next prime (9999984301).

It can be written as a sum of positive squares in only one way, i.e., 9507810064 + 492174225 = 97508^2 + 22185^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999984289 - 2¹⁹ = 9999460001 is a prime.

It is not a weakly prime, because it can be changed into another prime (9999984209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999992144 + 4999992145.

It is an arithmetic number, because the mean of its divisors is an integer number (4999992145).

Almost surely, 2^9999984289 is an apocalyptic number.

It is an amenable number.

9999984289 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999984289 is an equidigital number, since it uses as much as digits as its factorization.

9999984289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272097792, while the sum is 76.

The square root of 9999984289 is about 99999.9214449691. The cubic root of 9999984289 is about 2154.4335617538.

The spelling of 9999984289 in words is "nine billion, nine hundred ninety-nine million, nine hundred eighty-four thousand, two hundred eighty-nine".