98999999 has 8 divisors (see below), whose sum is σ = 113230848.
Its totient is φ = 84791160.
The previous prime is 98999987. The next prime is 99000007. The reversal of 98999999 is 99999989.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 98999999 - 24 = 98999983 is a prime.
It is a Duffinian number.
98999999 is a modest number, since divided by 9999 gives 9899 as remainder.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (98999969) 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 in 7 ways as a sum of consecutive naturals, for example, 5654 + ... + 15164.
It is an arithmetic number, because the mean of its divisors is an integer number (14153856).
Almost surely, 298999999 is an apocalyptic number.
98999999 is a deficient number, since it is larger than the sum of its proper divisors (14230849).
98999999 is a wasteful number, since it uses less digits than its factorization.
98999999 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11005.
The product of its digits is 38263752, while the sum is 71.
The square root of 98999999 is about 9949.8743208143.
The cubic root of 98999999 is about 462.6064993607.
The spelling of 98999999 in words is "ninety-eight million, nine hundred ninety-nine thousand, nine hundred ninety-nine".