99919910 has 16 divisors (see below), whose sum is σ = 179970336. Its totient is φ = 39942528.

The previous prime is 99919909. The next prime is 99919921. The reversal of 99919910 is 1991999.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26567 + ... + 30093.

It is an arithmetic number, because the mean of its divisors is an integer number (11248146).

Almost surely, 2^99919910 is an apocalyptic number.

99919910 is a deficient number, since it is larger than the sum of its proper divisors (80050426).

99919910 is a wasteful number, since it uses less digits than its factorization.

99919910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 99919910 is about 9995.9946978777. The cubic root of 99919910 is about 464.0349353155.

The spelling of 99919910 in words is "ninety-nine million, nine hundred nineteen thousand, nine hundred ten".