9898459081 has 27 divisors (see below), whose sum is σ = 11756849013. Its totient is φ = 8309488320.

The previous prime is 9898459057. The next prime is 9898459093. The reversal of 9898459081 is 1809548989.

The square root of 9898459081 is 99491.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6284525625 + 3613933456 = 79275^2 + 60116^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9898459081 is a prime.

It is a super-2 number, since 2×9898459081² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (9898459031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 42482541 + ... + 42482773.

Almost surely, 2^9898459081 is an apocalyptic number.

9898459081 is the 99491-st square number.

9898459081 is the 49746-th centered octagonal number.

It is an amenable number.

9898459081 is a deficient number, since it is larger than the sum of its proper divisors (1858389932).

9898459081 is an frugal number, since it uses more digits than its factorization.

9898459081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 61.

The cubic root of 9898459081 is about 2147.1177589885.

The spelling of 9898459081 in words is "nine billion, eight hundred ninety-eight million, four hundred fifty-nine thousand, eighty-one".