99684081 has 24 divisors (see below), whose sum is σ = 171793440. Its totient is φ = 56961576.

The previous prime is 99684041. The next prime is 99684103. The reversal of 99684081 is 18048699.

It is not a de Polignac number, because 99684081 - 2¹⁵ = 99651313 is a prime.

It is a super-2 number, since 2×99684081² = 19873832009629122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99684041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36351 + ... + 38996.

It is an arithmetic number, because the mean of its divisors is an integer number (7158060).

Almost surely, 2^99684081 is an apocalyptic number.

It is an amenable number.

99684081 is a deficient number, since it is larger than the sum of its proper divisors (72109359).

99684081 is a wasteful number, since it uses less digits than its factorization.

99684081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75370 (or 75357 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 99684081 is about 9984.1915546528. The cubic root of 99684081 is about 463.6695790296.

The spelling of 99684081 in words is "ninety-nine million, six hundred eighty-four thousand, eighty-one".