9998423 has 2 divisors, whose sum is σ = 9998424. Its totient is φ = 9998422.

The previous prime is 9998413. The next prime is 9998441. The reversal of 9998423 is 3248999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9998423 - 2¹⁶ = 9932887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999211 + 4999212.

It is an arithmetic number, because the mean of its divisors is an integer number (4999212).

Almost surely, 2^9998423 is an apocalyptic number.

9998423 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998423 is an equidigital number, since it uses as much as digits as its factorization.

9998423 is an evil number, because the sum of its binary digits is even.

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

The square root of 9998423 is about 3162.0283047436. The cubic root of 9998423 is about 215.4321432628.

The spelling of 9998423 in words is "nine million, nine hundred ninety-eight thousand, four hundred twenty-three".