998916859 has 2 divisors, whose sum is σ = 998916860. Its totient is φ = 998916858.

The previous prime is 998916847. The next prime is 998916871. The reversal of 998916859 is 958619899.

It is a balanced prime because it is at equal distance from previous prime (998916847) and next prime (998916871).

It is a cyclic number.

It is not a de Polignac number, because 998916859 - 2⁵ = 998916827 is a prime.

It is a super-3 number, since 3×998916859³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 998916859.

It is not a weakly prime, because it can be changed into another prime (998916829) 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, 499458429 + 499458430.

It is an arithmetic number, because the mean of its divisors is an integer number (499458430).

Almost surely, 2^998916859 is an apocalyptic number.

998916859 is a deficient number, since it is larger than the sum of its proper divisors (1).

998916859 is an equidigital number, since it uses as much as digits as its factorization.

998916859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12597120, while the sum is 64.

The square root of 998916859 is about 31605.6459987769. The cubic root of 998916859 is about 999.6388225666.

The spelling of 998916859 in words is "nine hundred ninety-eight million, nine hundred sixteen thousand, eight hundred fifty-nine".