9998311 has 4 divisors (see below), whose sum is σ = 10008072. Its totient is φ = 9988552.

The previous prime is 9998309. The next prime is 9998321. The reversal of 9998311 is 1138999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9998311 - 2¹ = 9998309 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9998311 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3136 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (2502018).

Almost surely, 2^9998311 is an apocalyptic number.

9998311 is a deficient number, since it is larger than the sum of its proper divisors (9761).

9998311 is a wasteful number, since it uses less digits than its factorization.

9998311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9760.

The product of its digits is 17496, while the sum is 40.

The square root of 9998311 is about 3162.0105945427. The cubic root of 9998311 is about 215.4313388529.

The spelling of 9998311 in words is "nine million, nine hundred ninety-eight thousand, three hundred eleven".