988199905 has 48 divisors (see below), whose sum is σ = 1525768704. Its totient is φ = 607461120.

The previous prime is 988199897. The next prime is 988199923. The reversal of 988199905 is 509991889.

It is a happy number.

It is not a de Polignac number, because 988199905 - 2³ = 988199897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 988199905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194224 + ... + 199246.

It is an arithmetic number, because the mean of its divisors is an integer number (31786848).

Almost surely, 2^988199905 is an apocalyptic number.

It is an amenable number.

988199905 is a deficient number, since it is larger than the sum of its proper divisors (537568799).

988199905 is a wasteful number, since it uses less digits than its factorization.

988199905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 5119 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 58.

The square root of 988199905 is about 31435.6470428079. The cubic root of 988199905 is about 996.0510614108.

The spelling of 988199905 in words is "nine hundred eighty-eight million, one hundred ninety-nine thousand, nine hundred five".