98009561 has 16 divisors (see below), whose sum is σ = 109408320. Its totient is φ = 87222720.

The previous prime is 98009551. The next prime is 98009563. The reversal of 98009561 is 16590089.

It is not a de Polignac number, because 98009561 - 2¹⁴ = 97993177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (98009563) 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, 39446 + ... + 41856.

It is an arithmetic number, because the mean of its divisors is an integer number (6838020).

Almost surely, 2^98009561 is an apocalyptic number.

It is an amenable number.

98009561 is a deficient number, since it is larger than the sum of its proper divisors (11398759).

98009561 is a wasteful number, since it uses less digits than its factorization.

98009561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 98009561 is about 9899.9778282580. The cubic root of 98009561 is about 461.0586220453.

The spelling of 98009561 in words is "ninety-eight million, nine thousand, five hundred sixty-one".