998886617 has 2 divisors, whose sum is σ = 998886618. Its totient is φ = 998886616.

The previous prime is 998886607. The next prime is 998886631. The reversal of 998886617 is 716688899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699285136 + 299601481 = 26444^2 + 17309^2 .

It is a cyclic number.

It is not a de Polignac number, because 998886617 - 2¹⁶ = 998821081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998886617.

It is not a weakly prime, because it can be changed into another prime (998886607) 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, 499443308 + 499443309.

It is an arithmetic number, because the mean of its divisors is an integer number (499443309).

Almost surely, 2^998886617 is an apocalyptic number.

It is an amenable number.

998886617 is a deficient number, since it is larger than the sum of its proper divisors (1).

998886617 is an equidigital number, since it uses as much as digits as its factorization.

998886617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 62.

The square root of 998886617 is about 31605.1675679785. The cubic root of 998886617 is about 999.6287345123.

The spelling of 998886617 in words is "nine hundred ninety-eight million, eight hundred eighty-six thousand, six hundred seventeen".