99818129 has 2 divisors, whose sum is σ = 99818130. Its totient is φ = 99818128.

The previous prime is 99818113. The next prime is 99818189. The reversal of 99818129 is 92181899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93702400 + 6115729 = 9680^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 99818129 - 2⁴ = 99818113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99818189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49909064 + 49909065.

It is an arithmetic number, because the mean of its divisors is an integer number (49909065).

Almost surely, 2^99818129 is an apocalyptic number.

It is an amenable number.

99818129 is a deficient number, since it is larger than the sum of its proper divisors (1).

99818129 is an equidigital number, since it uses as much as digits as its factorization.

99818129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 47.

The square root of 99818129 is about 9990.9023116033. The cubic root of 99818129 is about 463.8773224654.

The spelling of 99818129 in words is "ninety-nine million, eight hundred eighteen thousand, one hundred twenty-nine".