98999231 has 2 divisors, whose sum is σ = 98999232.
Its totient is φ = 98999230.
The previous prime is 98999207. The next prime is 98999233. The reversal of 98999231 is 13299989.
It is a strong prime.
It is an emirp because it is prime and its reverse (13299989) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 98999231 - 226 = 31890367 is a prime.
It is a super-2 number, since 2×989992312 = 19601695477182722, which contains 22 as substring.
Together with 98999233, it forms a pair of twin primes.
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 98999231.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (98999233) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49499615 + 49499616.
It is an arithmetic number, because the mean of its divisors is an integer number (49499616).
Almost surely, 298999231 is an apocalyptic number.
98999231 is a deficient number, since it is larger than the sum of its proper divisors (1).
98999231 is an equidigital number, since it uses as much as digits as its factorization.
98999231 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 98999231 is about 9949.8357272872.
The cubic root of 98999231 is about 462.6053031226.
The spelling of 98999231 in words is "ninety-eight million, nine hundred ninety-nine thousand, two hundred thirty-one".