998910019 has 4 divisors (see below), whose sum is σ = 1023273720. Its totient is φ = 974546320.

The previous prime is 998909969. The next prime is 998910041. The reversal of 998910019 is 910019899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998910019 - 2⁹ = 998909507 is a prime.

It is a super-2 number, since 2×998910019² = 1995642452117160722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998916019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12181789 + ... + 12181870.

It is an arithmetic number, because the mean of its divisors is an integer number (255818430).

Almost surely, 2^998910019 is an apocalyptic number.

998910019 is a deficient number, since it is larger than the sum of its proper divisors (24363701).

998910019 is a wasteful number, since it uses less digits than its factorization.

998910019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24363700.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 998910019 is about 31605.5377900772. The cubic root of 998910019 is about 999.6365409135.

The spelling of 998910019 in words is "nine hundred ninety-eight million, nine hundred ten thousand, nineteen".