9989423 has 2 divisors, whose sum is σ = 9989424. Its totient is φ = 9989422.

The previous prime is 9989417. The next prime is 9989431. The reversal of 9989423 is 3249899.

9989423 is nontrivially palindromic in base 13.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9989423 - 2⁸ = 9989167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9989123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994711 + 4994712.

It is an arithmetic number, because the mean of its divisors is an integer number (4994712).

Almost surely, 2^9989423 is an apocalyptic number.

9989423 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989423 is an equidigital number, since it uses as much as digits as its factorization.

9989423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 9989423 is about 3160.6048471772. The cubic root of 9989423 is about 215.3674840214.

The spelling of 9989423 in words is "nine million, nine hundred eighty-nine thousand, four hundred twenty-three".