9998171 has 4 divisors (see below), whose sum is σ = 10110600. Its totient is φ = 9885744.

The previous prime is 9998147. The next prime is 9998173. The reversal of 9998171 is 1718999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1718999 = 1097 ⋅1567.

It is a cyclic number.

It is not a de Polignac number, because 9998171 - 2¹⁴ = 9981787 is a prime.

It is a super-3 number, since 3×9998171³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9998173) 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 in 3 ways as a sum of consecutive naturals, for example, 56081 + ... + 56258.

It is an arithmetic number, because the mean of its divisors is an integer number (2527650).

Almost surely, 2^9998171 is an apocalyptic number.

9998171 is a deficient number, since it is larger than the sum of its proper divisors (112429).

9998171 is a wasteful number, since it uses less digits than its factorization.

9998171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112428.

The product of its digits is 40824, while the sum is 44.

The square root of 9998171 is about 3161.9884566519. The cubic root of 9998171 is about 215.4303333322.

The spelling of 9998171 in words is "nine million, nine hundred ninety-eight thousand, one hundred seventy-one".