9980281 has 2 divisors, whose sum is σ = 9980282. Its totient is φ = 9980280.

The previous prime is 9980279. The next prime is 9980287. The reversal of 9980281 is 1820899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9511056 + 469225 = 3084^2 + 685^2 .

It is an emirp because it is prime and its reverse (1820899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9980281 - 2¹ = 9980279 is a prime.

It is a super-2 number, since 2×9980281² = 199212017677922, which contains 22 as substring.

Together with 9980279, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9980281.

It is not a weakly prime, because it can be changed into another prime (9980287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990140 + 4990141.

It is an arithmetic number, because the mean of its divisors is an integer number (4990141).

Almost surely, 2^9980281 is an apocalyptic number.

It is an amenable number.

9980281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9980281 is an equidigital number, since it uses as much as digits as its factorization.

9980281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 9980281 is about 3159.1582739711. The cubic root of 9980281 is about 215.3017648280.

The spelling of 9980281 in words is "nine million, nine hundred eighty thousand, two hundred eighty-one".