99847 has 8 divisors (see below), whose sum is σ = 113040. Its totient is φ = 87360.

The previous prime is 99839. The next prime is 99859. The reversal of 99847 is 74899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99847 - 2³ = 99839 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163 + ... + 475.

It is an arithmetic number, because the mean of its divisors is an integer number (14130).

2⁹⁹⁸⁴⁷ is an apocalyptic number.

99847 is a deficient number, since it is larger than the sum of its proper divisors (13193).

99847 is a wasteful number, since it uses less digits than its factorization.

99847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its digits is 18144, while the sum is 37.

The square root of 99847 is about 315.9857591728. The cubic root of 99847 is about 46.3922041500.

It can be divided in two parts, 99 and 847, that added together give a triangular number (946 = T₄₃).

The spelling of 99847 in words is "ninety-nine thousand, eight hundred forty-seven".