9898826989 has 2 divisors, whose sum is σ = 9898826990. Its totient is φ = 9898826988.

The previous prime is 9898826957. The next prime is 9898827061. The reversal of 9898826989 is 9896288989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6567805764 + 3331021225 = 81042^2 + 57715^2 .

It is a cyclic number.

It is not a de Polignac number, because 9898826989 - 2⁵ = 9898826957 is a prime.

It is a super-2 number, since 2×9898826989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9898826939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949413494 + 4949413495.

It is an arithmetic number, because the mean of its divisors is an integer number (4949413495).

Almost surely, 2^9898826989 is an apocalyptic number.

It is an amenable number.

9898826989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9898826989 is an equidigital number, since it uses as much as digits as its factorization.

9898826989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322486272, while the sum is 76.

The square root of 9898826989 is about 99492.8489339812. The cubic root of 9898826989 is about 2147.1443601664.

The spelling of 9898826989 in words is "nine billion, eight hundred ninety-eight million, eight hundred twenty-six thousand, nine hundred eighty-nine".