201002189 has 2 divisors, whose sum is σ = 201002190. Its totient is φ = 201002188.

The previous prime is 201002177. The next prime is 201002227. The reversal of 201002189 is 981200102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200222500 + 779689 = 14150^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 201002189 - 2²⁴ = 184224973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201002489) 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, 100501094 + 100501095.

It is an arithmetic number, because the mean of its divisors is an integer number (100501095).

Almost surely, 2^201002189 is an apocalyptic number.

It is an amenable number.

201002189 is a deficient number, since it is larger than the sum of its proper divisors (1).

201002189 is an equidigital number, since it uses as much as digits as its factorization.

201002189 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 23.

The square root of 201002189 is about 14177.5240786253. The cubic root of 201002189 is about 585.7787267333.

The spelling of 201002189 in words is "two hundred one million, two thousand, one hundred eighty-nine".