998006081 has 2 divisors, whose sum is σ = 998006082. Its totient is φ = 998006080.

The previous prime is 998006021. The next prime is 998006083. The reversal of 998006081 is 180600899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696115456 + 301890625 = 26384^2 + 17375^2 .

It is a cyclic number.

It is not a de Polignac number, because 998006081 - 2⁶ = 998006017 is a prime.

It is a super-2 number, since 2×998006081² = 1992032275425957122, which contains 22 as substring.

Together with 998006083, 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 (998006083) 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, 499003040 + 499003041.

It is an arithmetic number, because the mean of its divisors is an integer number (499003041).

Almost surely, 2^998006081 is an apocalyptic number.

It is an amenable number.

998006081 is a deficient number, since it is larger than the sum of its proper divisors (1).

998006081 is an equidigital number, since it uses as much as digits as its factorization.

998006081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 998006081 is about 31591.2342430618. The cubic root of 998006081 is about 999.3349180975.

The spelling of 998006081 in words is "nine hundred ninety-eight million, six thousand, eighty-one".