210018089 has 2 divisors, whose sum is σ = 210018090. Its totient is φ = 210018088.

The previous prime is 210018049. The next prime is 210018097. The reversal of 210018089 is 980810012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210018064 + 25 = 14492^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 210018089 - 2⁸ = 210017833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210018049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105009044 + 105009045.

It is an arithmetic number, because the mean of its divisors is an integer number (105009045).

Almost surely, 2^210018089 is an apocalyptic number.

It is an amenable number.

210018089 is a deficient number, since it is larger than the sum of its proper divisors (1).

210018089 is an equidigital number, since it uses as much as digits as its factorization.

210018089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 210018089 is about 14492.0008625448. Note that the first 3 decimals coincide. The cubic root of 210018089 is about 594.4092613902.

The spelling of 210018089 in words is "two hundred ten million, eighteen thousand, eighty-nine".