998716841 has 2 divisors, whose sum is σ = 998716842. Its totient is φ = 998716840.

The previous prime is 998716813. The next prime is 998716843. The reversal of 998716841 is 148617899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641355625 + 357361216 = 25325^2 + 18904^2 .

It is a cyclic number.

It is not a de Polignac number, because 998716841 - 2²² = 994522537 is a prime.

Together with 998716843, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998716843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499358420 + 499358421.

It is an arithmetic number, because the mean of its divisors is an integer number (499358421).

Almost surely, 2^998716841 is an apocalyptic number.

It is an amenable number.

998716841 is a deficient number, since it is larger than the sum of its proper divisors (1).

998716841 is an equidigital number, since it uses as much as digits as its factorization.

998716841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 53.

The square root of 998716841 is about 31602.4815639532. The cubic root of 998716841 is about 999.5720972587.

The spelling of 998716841 in words is "nine hundred ninety-eight million, seven hundred sixteen thousand, eight hundred forty-one".