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998724281 is a prime number
BaseRepresentation
bin111011100001110…
…101001010111001
32120121021110011012
4323201311022321
54021133134111
6243034043305
733515005412
oct7341651271
92517243135
10998724281
11472832375
1223a579535
1312bbb1619
14968d8809
155ca2d48b
hex3b8752b9

998724281 has 2 divisors, whose sum is σ = 998724282. Its totient is φ = 998724280.

The previous prime is 998724229. The next prime is 998724323. The reversal of 998724281 is 182427899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735765625 + 262958656 = 27125^2 + 16216^2 .

It is an emirp because it is prime and its reverse (182427899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998724281 - 26 = 998724217 is a prime.

It is a super-2 number, since 2×9987242812 = 1994900378917933922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998721281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499362140 + 499362141.

It is an arithmetic number, because the mean of its divisors is an integer number (499362141).

Almost surely, 2998724281 is an apocalyptic number.

It is an amenable number.

998724281 is a deficient number, since it is larger than the sum of its proper divisors (1).

998724281 is an equidigital number, since it uses as much as digits as its factorization.

998724281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 998724281 is about 31602.5992760089. The cubic root of 998724281 is about 999.5745793763.

The spelling of 998724281 in words is "nine hundred ninety-eight million, seven hundred twenty-four thousand, two hundred eighty-one".