998909899 has 8 divisors (see below), whose sum is σ = 1085619920. Its totient is φ = 913610016.

The previous prime is 998909887. The next prime is 998909903.

998909899 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998909899 - 2¹¹ = 998907851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998909839) 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 in 7 ways as a sum of consecutive naturals, for example, 351057 + ... + 353890.

It is an arithmetic number, because the mean of its divisors is an integer number (135702490).

Almost surely, 2^998909899 is an apocalyptic number.

998909899 is a deficient number, since it is larger than the sum of its proper divisors (86710021).

998909899 is a wasteful number, since it uses less digits than its factorization.

998909899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705069.

The product of its (nonzero) digits is 34012224, while the sum is 70.

The square root of 998909899 is about 31605.5358916757. The cubic root of 998909899 is about 999.6365008844.

The spelling of 998909899 in words is "nine hundred ninety-eight million, nine hundred nine thousand, eight hundred ninety-nine".