99861612 has 12 divisors (see below), whose sum is σ = 233010456. Its totient is φ = 33287200.

The previous prime is 99861611. The next prime is 99861617. The reversal of 99861612 is 21616899.

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

It is not an unprimeable number, because it can be changed into a prime (99861611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4160889 + ... + 4160912.

It is an arithmetic number, because the mean of its divisors is an integer number (19417538).

Almost surely, 2^99861612 is an apocalyptic number.

It is an amenable number.

99861612 is an abundant number, since it is smaller than the sum of its proper divisors (133148844).

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

99861612 is a wasteful number, since it uses less digits than its factorization.

99861612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321808 (or 8321806 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 99861612 is about 9993.0782044373. The cubic root of 99861612 is about 463.9446711177.

The spelling of 99861612 in words is "ninety-nine million, eight hundred sixty-one thousand, six hundred twelve".