99839212 has 24 divisors (see below), whose sum is σ = 191136960. Its totient is φ = 45254160.

The previous prime is 99839203. The next prime is 99839213. The reversal of 99839212 is 21293899.

It is not an unprimeable number, because it can be changed into a prime (99839213) 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, 13683 + ... + 19669.

It is an arithmetic number, because the mean of its divisors is an integer number (7964040).

Almost surely, 2^99839212 is an apocalyptic number.

It is an amenable number.

99839212 is a deficient number, since it is larger than the sum of its proper divisors (91297748).

99839212 is a wasteful number, since it uses less digits than its factorization.

99839212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6381 (or 6379 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 99839212 is about 9991.9573658018. The cubic root of 99839212 is about 463.9099793158.

The spelling of 99839212 in words is "ninety-nine million, eight hundred thirty-nine thousand, two hundred twelve".