98018991 has 40 divisors (see below), whose sum is σ = 177202080. Its totient is φ = 52710912.

The previous prime is 98018989. The next prime is 98019067. The reversal of 98018991 is 19981089.

It is not a de Polignac number, because 98018991 - 2¹ = 98018989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98018911) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4555 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (4430052).

Almost surely, 2^98018991 is an apocalyptic number.

98018991 is a deficient number, since it is larger than the sum of its proper divisors (79183089).

98018991 is a wasteful number, since it uses less digits than its factorization.

98018991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10205 (or 10196 counting only the distinct ones).

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

The square root of 98018991 is about 9900.4540804955. The cubic root of 98018991 is about 461.0734085053.

The spelling of 98018991 in words is "ninety-eight million, eighteen thousand, nine hundred ninety-one".