98091999 has 8 divisors (see below), whose sum is σ = 145321520. Its totient is φ = 65394648.

The previous prime is 98091991. The next prime is 98092019. The reversal of 98091999 is 99919089.

It is not a de Polignac number, because 98091999 - 2³ = 98091991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98091991) 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 in 7 ways as a sum of consecutive naturals, for example, 1816492 + ... + 1816545.

It is an arithmetic number, because the mean of its divisors is an integer number (18165190).

Almost surely, 2^98091999 is an apocalyptic number.

98091999 is a deficient number, since it is larger than the sum of its proper divisors (47229521).

98091999 is a wasteful number, since it uses less digits than its factorization.

98091999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633046 (or 3633040 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The square root of 98091999 is about 9904.1404977918. The cubic root of 98091999 is about 461.1878546719.

The spelling of 98091999 in words is "ninety-eight million, ninety-one thousand, nine hundred ninety-nine".