998099819 has 2 divisors, whose sum is σ = 998099820. Its totient is φ = 998099818.

The previous prime is 998099807. The next prime is 998099831. The reversal of 998099819 is 918990899.

It is a balanced prime because it is at equal distance from previous prime (998099807) and next prime (998099831).

It is an emirp because it is prime and its reverse (918990899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998099819 - 2⁴ = 998099803 is a prime.

It is a super-2 number, since 2×998099819² = 1992406497375665522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998099899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499049909 + 499049910.

It is an arithmetic number, because the mean of its divisors is an integer number (499049910).

Almost surely, 2^998099819 is an apocalyptic number.

998099819 is a deficient number, since it is larger than the sum of its proper divisors (1).

998099819 is an equidigital number, since it uses as much as digits as its factorization.

998099819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 62.

The square root of 998099819 is about 31592.7178159778. The cubic root of 998099819 is about 999.3662047217.

The spelling of 998099819 in words is "nine hundred ninety-eight million, ninety-nine thousand, eight hundred nineteen".