9820201 has 2 divisors, whose sum is σ = 9820202. Its totient is φ = 9820200.

The previous prime is 9820199. The next prime is 9820219. The reversal of 9820201 is 1020289.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8696601 + 1123600 = 2949^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 9820201 - 2¹ = 9820199 is a prime.

Together with 9820199, it forms a pair of twin primes.

9820201 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9820301) 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, 4910100 + 4910101.

It is an arithmetic number, because the mean of its divisors is an integer number (4910101).

Almost surely, 2^9820201 is an apocalyptic number.

It is an amenable number.

9820201 is a deficient number, since it is larger than the sum of its proper divisors (1).

9820201 is an equidigital number, since it uses as much as digits as its factorization.

9820201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 9820201 is about 3133.7199938731. The cubic root of 9820201 is about 214.1444347684.

The spelling of 9820201 in words is "nine million, eight hundred twenty thousand, two hundred one".