99990012 has 24 divisors (see below), whose sum is σ = 237713616. Its totient is φ = 32700928.

The previous prime is 99990001. The next prime is 99990029. The reversal of 99990012 is 21009999.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77973 + ... + 79244.

It is an arithmetic number, because the mean of its divisors is an integer number (9904734).

Almost surely, 2^99990012 is an apocalyptic number.

It is an amenable number.

99990012 is an abundant number, since it is smaller than the sum of its proper divisors (137723604).

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

99990012 is a wasteful number, since it uses less digits than its factorization.

99990012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157277 (or 157275 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 99990012 is about 9999.5005875294. The cubic root of 99990012 is about 464.1434294503.

The spelling of 99990012 in words is "ninety-nine million, nine hundred ninety thousand, twelve".