9998123 has 16 divisors (see below), whose sum is σ = 11128320. Its totient is φ = 8940096.

The previous prime is 9998119. The next prime is 9998129. The reversal of 9998123 is 3218999.

9998123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9998123 - 2² = 9998119 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9998129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59786 + ... + 59952.

It is an arithmetic number, because the mean of its divisors is an integer number (695520).

Almost surely, 2^9998123 is an apocalyptic number.

9998123 is a deficient number, since it is larger than the sum of its proper divisors (1130197).

9998123 is a wasteful number, since it uses less digits than its factorization.

9998123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its digits is 34992, while the sum is 41.

The square root of 9998123 is about 3161.9808664823. The cubic root of 9998123 is about 215.4299885800.

The spelling of 9998123 in words is "nine million, nine hundred ninety-eight thousand, one hundred twenty-three".