99829 has 2 divisors, whose sum is σ = 99830. Its totient is φ = 99828.

The previous prime is 99823. The next prime is 99833. The reversal of 99829 is 92899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88804 + 11025 = 298^2 + 105^2 .

It is an emirp because it is prime and its reverse (92899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99829 - 2⁹ = 99317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49914 + 49915.

It is an arithmetic number, because the mean of its divisors is an integer number (49915).

2⁹⁹⁸²⁹ is an apocalyptic number.

It is an amenable number.

99829 is a deficient number, since it is larger than the sum of its proper divisors (1).

99829 is an equidigital number, since it uses as much as digits as its factorization.

99829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The square root of 99829 is about 315.9572755928. The cubic root of 99829 is about 46.3894161849.

The spelling of 99829 in words is "ninety-nine thousand, eight hundred twenty-nine".