99998291 has 2 divisors, whose sum is σ = 99998292. Its totient is φ = 99998290.

The previous prime is 99998257. The next prime is 99998299. The reversal of 99998291 is 19289999.

It is a strong prime.

It is an emirp because it is prime and its reverse (19289999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99998291 - 2¹⁰ = 99997267 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (99998299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999145 + 49999146.

It is an arithmetic number, because the mean of its divisors is an integer number (49999146).

Almost surely, 2^99998291 is an apocalyptic number.

99998291 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998291 is an equidigital number, since it uses as much as digits as its factorization.

99998291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 56.

The square root of 99998291 is about 9999.9145496349. The cubic root of 99998291 is about 464.1562391878.

The spelling of 99998291 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred ninety-one".