210002189 has 2 divisors, whose sum is σ = 210002190. Its totient is φ = 210002188.

The previous prime is 210002179. The next prime is 210002203. The reversal of 210002189 is 981200012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176013289 + 33988900 = 13267^2 + 5830^2 .

It is a cyclic number.

It is not a de Polignac number, because 210002189 - 2⁸ = 210001933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210002119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105001094 + 105001095.

It is an arithmetic number, because the mean of its divisors is an integer number (105001095).

Almost surely, 2^210002189 is an apocalyptic number.

It is an amenable number.

210002189 is a deficient number, since it is larger than the sum of its proper divisors (1).

210002189 is an equidigital number, since it uses as much as digits as its factorization.

210002189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 210002189 is about 14491.4522736681. The cubic root of 210002189 is about 594.3942605461.

The spelling of 210002189 in words is "two hundred ten million, two thousand, one hundred eighty-nine".