9998129 has 2 divisors, whose sum is σ = 9998130. Its totient is φ = 9998128.

The previous prime is 9998119. The next prime is 9998141. The reversal of 9998129 is 9218999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9610000 + 388129 = 3100^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998129 - 2⁸ = 9997873 is a prime.

It is not a weakly prime, because it can be changed into another prime (9998119) 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, 4999064 + 4999065.

It is an arithmetic number, because the mean of its divisors is an integer number (4999065).

Almost surely, 2^9998129 is an apocalyptic number.

It is an amenable number.

9998129 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998129 is an equidigital number, since it uses as much as digits as its factorization.

9998129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 47.

The square root of 9998129 is about 3161.9818152545. The cubic root of 9998129 is about 215.4300316741.

The spelling of 9998129 in words is "nine million, nine hundred ninety-eight thousand, one hundred twenty-nine".