99681147 has 6 divisors (see below), whose sum is σ = 143983892. Its totient is φ = 66454092.

The previous prime is 99681139. The next prime is 99681187. The reversal of 99681147 is 74118699.

It is a happy number.

It is not a de Polignac number, because 99681147 - 2³ = 99681139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99681187) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5537833 + ... + 5537850.

Almost surely, 2^99681147 is an apocalyptic number.

99681147 is a deficient number, since it is larger than the sum of its proper divisors (44302745).

99681147 is a wasteful number, since it uses less digits than its factorization.

99681147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11075689 (or 11075686 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 99681147 is about 9984.0446212945. The cubic root of 99681147 is about 463.6650299251.

The spelling of 99681147 in words is "ninety-nine million, six hundred eighty-one thousand, one hundred forty-seven".