99509812 has 12 divisors (see below), whose sum is σ = 174521536. Its totient is φ = 49646520.

The previous prime is 99509803. The next prime is 99509833. The reversal of 99509812 is 21890599.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25014 + ... + 28717.

Almost surely, 2^99509812 is an apocalyptic number.

It is an amenable number.

99509812 is a deficient number, since it is larger than the sum of its proper divisors (75011724).

99509812 is a wasteful number, since it uses less digits than its factorization.

99509812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54198 (or 54196 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 99509812 is about 9975.4604906240. The cubic root of 99509812 is about 463.3992237033.

The spelling of 99509812 in words is "ninety-nine million, five hundred nine thousand, eight hundred twelve".