998194019 has 2 divisors, whose sum is σ = 998194020. Its totient is φ = 998194018.

The previous prime is 998194003. The next prime is 998194027. The reversal of 998194019 is 910491899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998194019 - 2⁴ = 998194003 is a prime.

It is a super-2 number, since 2×998194019² = 1992782599134744722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998194069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499097009 + 499097010.

It is an arithmetic number, because the mean of its divisors is an integer number (499097010).

Almost surely, 2^998194019 is an apocalyptic number.

998194019 is a deficient number, since it is larger than the sum of its proper divisors (1).

998194019 is an equidigital number, since it uses as much as digits as its factorization.

998194019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 998194019 is about 31594.2086306969. The cubic root of 998194019 is about 999.3976435729.

The spelling of 998194019 in words is "nine hundred ninety-eight million, one hundred ninety-four thousand, nineteen".