98809 has 2 divisors, whose sum is σ = 98810.
Its totient is φ = 98808.
The previous prime is 98807. The next prime is 98837. The reversal of 98809 is 90889.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 57600 + 41209 = 240^2 + 203^2
It is a cyclic number.
It is not a de Polignac number, because 98809 - 21 = 98807 is a prime.
Together with 98807, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (98801) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49404 + 49405.
It is an arithmetic number, because the mean of its divisors is an integer number (49405).
298809 is an apocalyptic number.
It is an amenable number.
98809 is a deficient number, since it is larger than the sum of its proper divisors (1).
98809 is an equidigital number, since it uses as much as digits as its factorization.
98809 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 5184, while the sum is 34.
The square root of 98809 is about 314.3389889912.
The cubic root of 98809 is about 46.2308808240.
It can be divided in two parts, 9880 and 9, that added together give a palindrome (9889).
The spelling of 98809 in words is "ninety-eight thousand, eight hundred nine".