98981 has 2 divisors, whose sum is σ = 98982. Its totient is φ = 98980.

The previous prime is 98963. The next prime is 98993. The reversal of 98981 is 18989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62500 + 36481 = 250^2 + 191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98981 is a prime.

It is a super-2 number, since 2×98981² = 19594476722, which contains 22 as substring.

It is a Sophie Germain prime.

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

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 98981.

It is not a weakly prime, because it can be changed into another prime (98911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49490 + 49491.

It is an arithmetic number, because the mean of its divisors is an integer number (49491).

2⁹⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

98981 is a deficient number, since it is larger than the sum of its proper divisors (1).

98981 is an equidigital number, since it uses as much as digits as its factorization.

98981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 98981 is about 314.6124600203. The cubic root of 98981 is about 46.2576904670.

The spelling of 98981 in words is "ninety-eight thousand, nine hundred eighty-one".