98905509 has 16 divisors (see below), whose sum is σ = 146875200. Its totient is φ = 65780208.

The previous prime is 98905487. The next prime is 98905523. The reversal of 98905509 is 90550989.

98905509 is a `hidden beast` number, since 9 + 8 + 90 + 550 + 9 = 666.

It is not a de Polignac number, because 98905509 - 2⁷ = 98905381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98905549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7827 + ... + 16095.

It is an arithmetic number, because the mean of its divisors is an integer number (9179700).

Almost surely, 2^98905509 is an apocalyptic number.

It is an amenable number.

98905509 is a deficient number, since it is larger than the sum of its proper divisors (47969691).

98905509 is a wasteful number, since it uses less digits than its factorization.

98905509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8715 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The square root of 98905509 is about 9945.1248860937. The cubic root of 98905509 is about 462.4592751090.

The spelling of 98905509 in words is "ninety-eight million, nine hundred five thousand, five hundred nine".