211149989 has 2 divisors, whose sum is σ = 211149990. Its totient is φ = 211149988.

The previous prime is 211149973. The next prime is 211150001. The reversal of 211149989 is 989941112.

211149989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169650625 + 41499364 = 13025^2 + 6442^2 .

It is a cyclic number.

It is not a de Polignac number, because 211149989 - 2⁴ = 211149973 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 (211149929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105574994 + 105574995.

It is an arithmetic number, because the mean of its divisors is an integer number (105574995).

Almost surely, 2^211149989 is an apocalyptic number.

It is an amenable number.

211149989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211149989 is an equidigital number, since it uses as much as digits as its factorization.

211149989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 44.

The square root of 211149989 is about 14531.0009634574. Note that the first 3 decimals coincide. The cubic root of 211149989 is about 595.4752120071.

The spelling of 211149989 in words is "two hundred eleven million, one hundred forty-nine thousand, nine hundred eighty-nine".