998117 has 2 divisors, whose sum is σ = 998118. Its totient is φ = 998116.

The previous prime is 998111. The next prime is 998147. The reversal of 998117 is 711899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 25921 = 986^2 + 161^2 .

It is an emirp because it is prime and its reverse (711899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998117 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998117.

It is not a weakly prime, because it can be changed into another prime (998111) 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 as a sum of consecutive naturals, namely, 499058 + 499059.

It is an arithmetic number, because the mean of its divisors is an integer number (499059).

2⁹⁹⁸¹¹⁷ is an apocalyptic number.

It is an amenable number.

998117 is a deficient number, since it is larger than the sum of its proper divisors (1).

998117 is an equidigital number, since it uses as much as digits as its factorization.

998117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 35.

The square root of 998117 is about 999.0580563711. The cubic root of 998117 is about 99.9371938955.

The spelling of 998117 in words is "nine hundred ninety-eight thousand, one hundred seventeen".