99843 has 8 divisors (see below), whose sum is σ = 139008. Its totient is φ = 63624.

The previous prime is 99839. The next prime is 99859. The reversal of 99843 is 34899.

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

It is not a de Polignac number, because 99843 - 2² = 99839 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 9² + 9³ + 8⁵ + 4⁸ + 3⁶ .

99843 is a lucky number.

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (99823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (17376).

2⁹⁹⁸⁴³ is an apocalyptic number.

99843 is a deficient number, since it is larger than the sum of its proper divisors (39165).

99843 is a wasteful number, since it uses less digits than its factorization.

99843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 7776, while the sum is 33.

The square root of 99843 is about 315.9794297102. The cubic root of 99843 is about 46.3915846312.

The spelling of 99843 in words is "ninety-nine thousand, eight hundred forty-three".