998819117 has 2 divisors, whose sum is σ = 998819118. Its totient is φ = 998819116.

The previous prime is 998819099. The next prime is 998819141. The reversal of 998819117 is 711918899.

998819117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 996917476 + 1901641 = 31574^2 + 1379^2 .

It is a cyclic number.

It is not a de Polignac number, because 998819117 - 2⁶ = 998819053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998819167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499409558 + 499409559.

It is an arithmetic number, because the mean of its divisors is an integer number (499409559).

Almost surely, 2^998819117 is an apocalyptic number.

It is an amenable number.

998819117 is a deficient number, since it is larger than the sum of its proper divisors (1).

998819117 is an equidigital number, since it uses as much as digits as its factorization.

998819117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 53.

The square root of 998819117 is about 31604.0996865913. The cubic root of 998819117 is about 999.6062172889.

The spelling of 998819117 in words is "nine hundred ninety-eight million, eight hundred nineteen thousand, one hundred seventeen".