98989898981 has 2 divisors, whose sum is σ = 98989898982. Its totient is φ = 98989898980.

The previous prime is 98989898951. The next prime is 98989899011. The reversal of 98989898981 is 18989898989.

It is a balanced prime because it is at equal distance from previous prime (98989898951) and next prime (98989899011).

It can be written as a sum of positive squares in only one way, i.e., 98951768356 + 38130625 = 314566^2 + 6175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98989898981 is a prime.

It is a super-2 number, since 2×98989898981² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 98989898893 and 98989898902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98989898951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49494949490 + 49494949491.

It is an arithmetic number, because the mean of its divisors is an integer number (49494949491).

Almost surely, 2^98989898981 is an apocalyptic number.

It is an amenable number.

98989898981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98989898981 is an equidigital number, since it uses as much as digits as its factorization.

98989898981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1934917632, while the sum is 86.

The spelling of 98989898981 in words is "ninety-eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-one".