98981009 has 2 divisors, whose sum is σ = 98981010. Its totient is φ = 98981008.

The previous prime is 98980997. The next prime is 98981023. The reversal of 98981009 is 90018989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70090384 + 28890625 = 8372^2 + 5375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98981009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98980009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49490504 + 49490505.

It is an arithmetic number, because the mean of its divisors is an integer number (49490505).

Almost surely, 2^98981009 is an apocalyptic number.

It is an amenable number.

98981009 is a deficient number, since it is larger than the sum of its proper divisors (1).

98981009 is an equidigital number, since it uses as much as digits as its factorization.

98981009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 98981009 is about 9948.9199916373. The cubic root of 98981009 is about 462.5769186897.

The spelling of 98981009 in words is "ninety-eight million, nine hundred eighty-one thousand, nine".