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98561 is a prime number
BaseRepresentation
bin11000000100000001
312000012102
4120010001
511123221
62040145
7560231
oct300401
9160172
1098561
1168061
1249055
1335b28
1427cc1
151e30b
hex18101

98561 has 2 divisors, whose sum is σ = 98562. Its totient is φ = 98560.

The previous prime is 98543. The next prime is 98563. The reversal of 98561 is 16589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78961 + 19600 = 281^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-98561 is a prime.

It is a Sophie Germain prime.

Together with 98563, it forms a pair of twin primes.

It is a Chen prime.

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

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (98563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49280 + 49281.

It is an arithmetic number, because the mean of its divisors is an integer number (49281).

298561 is an apocalyptic number.

It is an amenable number.

98561 is a deficient number, since it is larger than the sum of its proper divisors (1).

98561 is an equidigital number, since it uses as much as digits as its factorization.

98561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 98561 is about 313.9442625690. The cubic root of 98561 is about 46.1921702341.

The spelling of 98561 in words is "ninety-eight thousand, five hundred sixty-one".