99864012 has 12 divisors (see below), whose sum is σ = 233016056. Its totient is φ = 33288000.

The previous prime is 99863957. The next prime is 99864013. The reversal of 99864012 is 21046899.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×99864012² = 19945641785472288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99864013) 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 3 ways as a sum of consecutive naturals, for example, 4160989 + ... + 4161012.

Almost surely, 2^99864012 is an apocalyptic number.

It is an amenable number.

99864012 is an abundant number, since it is smaller than the sum of its proper divisors (133152044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99864012 is a wasteful number, since it uses less digits than its factorization.

99864012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322008 (or 8322006 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 99864012 is about 9993.1982868349. The cubic root of 99864012 is about 463.9483877887.

The spelling of 99864012 in words is "ninety-nine million, eight hundred sixty-four thousand, twelve".