201289289 has 2 divisors, whose sum is σ = 201289290. Its totient is φ = 201289288.

The previous prime is 201289279. The next prime is 201289301. The reversal of 201289289 is 982982102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198330889 + 2958400 = 14083^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 201289289 - 2²⁰ = 200240713 is a prime.

It is a super-2 number, since 2×201289289² = 81034755732251042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201289219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100644644 + 100644645.

It is an arithmetic number, because the mean of its divisors is an integer number (100644645).

Almost surely, 2^201289289 is an apocalyptic number.

It is an amenable number.

201289289 is a deficient number, since it is larger than the sum of its proper divisors (1).

201289289 is an equidigital number, since it uses as much as digits as its factorization.

201289289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 201289289 is about 14187.6456468295. The cubic root of 201289289 is about 586.0574916317.

The spelling of 201289289 in words is "two hundred one million, two hundred eighty-nine thousand, two hundred eighty-nine".