99823 has 2 divisors, whose sum is σ = 99824. Its totient is φ = 99822.

The previous prime is 99817. The next prime is 99829. The reversal of 99823 is 32899.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (99817) and next prime (99829).

It is a cyclic number.

It is not a de Polignac number, because 99823 - 2¹³ = 91631 is a prime.

99823 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49911 + 49912.

It is an arithmetic number, because the mean of its divisors is an integer number (49912).

2⁹⁹⁸²³ is an apocalyptic number.

99823 is a deficient number, since it is larger than the sum of its proper divisors (1).

99823 is an equidigital number, since it uses as much as digits as its factorization.

99823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 99823 is about 315.9477804954. The cubic root of 99823 is about 46.3884867887.

The spelling of 99823 in words is "ninety-nine thousand, eight hundred twenty-three".