998866201 has 2 divisors, whose sum is σ = 998866202. Its totient is φ = 998866200.

The previous prime is 998866199. The next prime is 998866213. The reversal of 998866201 is 102668899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517107600 + 481758601 = 22740^2 + 21949^2 .

It is a cyclic number.

It is not a de Polignac number, because 998866201 - 2¹ = 998866199 is a prime.

Together with 998866199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (998866261) 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, 499433100 + 499433101.

It is an arithmetic number, because the mean of its divisors is an integer number (499433101).

Almost surely, 2^998866201 is an apocalyptic number.

It is an amenable number.

998866201 is a deficient number, since it is larger than the sum of its proper divisors (1).

998866201 is an equidigital number, since it uses as much as digits as its factorization.

998866201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 998866201 is about 31604.8445811714. The cubic root of 998866201 is about 999.6219240766.

The spelling of 998866201 in words is "nine hundred ninety-eight million, eight hundred sixty-six thousand, two hundred one".