99998231 has 2 divisors, whose sum is σ = 99998232. Its totient is φ = 99998230.

The previous prime is 99998207. The next prime is 99998251. The reversal of 99998231 is 13289999.

It is a strong prime.

It is an emirp because it is prime and its reverse (13289999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99998231 - 2²² = 95803927 is a prime.

It is a super-2 number, since 2×99998231² = 19999292406258722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99998231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99998251) 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, 49999115 + 49999116.

It is an arithmetic number, because the mean of its divisors is an integer number (49999116).

Almost surely, 2^99998231 is an apocalyptic number.

99998231 is a deficient number, since it is larger than the sum of its proper divisors (1).

99998231 is an equidigital number, since it uses as much as digits as its factorization.

99998231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 50.

The square root of 99998231 is about 9999.9115496088. The cubic root of 99998231 is about 464.1561463549.

The spelling of 99998231 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred thirty-one".