9904289 has 2 divisors, whose sum is σ = 9904290. Its totient is φ = 9904288.

The previous prime is 9904277. The next prime is 9904291. The reversal of 9904289 is 9824099.

9904289 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 2505889 = 2720^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 9904289 - 2⁴ = 9904273 is a prime.

Together with 9904291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9904189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4952144 + 4952145.

It is an arithmetic number, because the mean of its divisors is an integer number (4952145).

Almost surely, 2^9904289 is an apocalyptic number.

It is an amenable number.

9904289 is a deficient number, since it is larger than the sum of its proper divisors (1).

9904289 is an equidigital number, since it uses as much as digits as its factorization.

9904289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 9904289 is about 3147.1080375481. The cubic root of 9904289 is about 214.7539207278.

The spelling of 9904289 in words is "nine million, nine hundred four thousand, two hundred eighty-nine".