211200989 has 2 divisors, whose sum is σ = 211200990. Its totient is φ = 211200988.

The previous prime is 211200961. The next prime is 211201007. The reversal of 211200989 is 989002112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211120900 + 80089 = 14530^2 + 283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211200989 is a prime.

It is a Chen prime.

It is equal to p_11664158 and since 211200989 and 11664158 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200949) 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, 105600494 + 105600495.

It is an arithmetic number, because the mean of its divisors is an integer number (105600495).

Almost surely, 2^211200989 is an apocalyptic number.

It is an amenable number.

211200989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200989 is an equidigital number, since it uses as much as digits as its factorization.

211200989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 211200989 is about 14532.7557262895. The cubic root of 211200989 is about 595.5231507436.

The spelling of 211200989 in words is "two hundred eleven million, two hundred thousand, nine hundred eighty-nine".