99821612 has 36 divisors (see below), whose sum is σ = 198235968. Its totient is φ = 43903200.

The previous prime is 99821609. The next prime is 99821629. The reversal of 99821612 is 21612899.

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 11 ways as a sum of consecutive naturals, for example, 11678 + ... + 18330.

Almost surely, 2^99821612 is an apocalyptic number.

It is an amenable number.

99821612 is a deficient number, since it is larger than the sum of its proper divisors (98414356).

99821612 is a wasteful number, since it uses less digits than its factorization.

99821612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710 (or 6697 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 99821612 is about 9991.0766186633. The cubic root of 99821612 is about 463.8827178311.

The spelling of 99821612 in words is "ninety-nine million, eight hundred twenty-one thousand, six hundred twelve".