98981091 has 12 divisors (see below), whose sum is σ = 155970360. Its totient is φ = 59988480.

The previous prime is 98981081. The next prime is 98981119. The reversal of 98981091 is 19018989.

It is not a de Polignac number, because 98981091 - 2¹⁰ = 98980067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98981041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499806 + ... + 500003.

It is an arithmetic number, because the mean of its divisors is an integer number (12997530).

Almost surely, 2^98981091 is an apocalyptic number.

98981091 is a deficient number, since it is larger than the sum of its proper divisors (56989269).

98981091 is a wasteful number, since it uses less digits than its factorization.

98981091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999826 (or 999823 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 98981091 is about 9948.9241126868. The cubic root of 98981091 is about 462.5770464290.

It can be divided in two parts, 98 and 981091, that added together give a palindrome (981189).

The spelling of 98981091 in words is "ninety-eight million, nine hundred eighty-one thousand, ninety-one".