9890004389 has 2 divisors, whose sum is σ = 9890004390. Its totient is φ = 9890004388.

The previous prime is 9890004373. The next prime is 9890004401. The reversal of 9890004389 is 9834000989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9882348100 + 7656289 = 99410^2 + 2767^2 .

It is a cyclic number.

It is not a de Polignac number, because 9890004389 - 2⁴ = 9890004373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9890004349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4945002194 + 4945002195.

It is an arithmetic number, because the mean of its divisors is an integer number (4945002195).

Almost surely, 2^9890004389 is an apocalyptic number.

It is an amenable number.

9890004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

9890004389 is an equidigital number, since it uses as much as digits as its factorization.

9890004389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 9890004389 is about 99448.5011903146. The cubic root of 9890004389 is about 2146.5062701995.

The spelling of 9890004389 in words is "nine billion, eight hundred ninety million, four thousand, three hundred eighty-nine".