9998197 has 4 divisors (see below), whose sum is σ = 10907136. Its totient is φ = 9089260.

The previous prime is 9998179. The next prime is 9998201. The reversal of 9998197 is 7918999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9998197 - 2¹¹ = 9996149 is a prime.

It is a Duffinian number.

9998197 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998117) 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, 454453 + ... + 454474.

It is an arithmetic number, because the mean of its divisors is an integer number (2726784).

Almost surely, 2^9998197 is an apocalyptic number.

It is an amenable number.

9998197 is a deficient number, since it is larger than the sum of its proper divisors (908939).

9998197 is a wasteful number, since it uses less digits than its factorization.

9998197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908938.

The product of its digits is 367416, while the sum is 52.

The square root of 9998197 is about 3161.9925679862. The cubic root of 9998197 is about 215.4305200724.

The spelling of 9998197 in words is "nine million, nine hundred ninety-eight thousand, one hundred ninety-seven".