211049749 has 2 divisors, whose sum is σ = 211049750. Its totient is φ = 211049748.

The previous prime is 211049737. The next prime is 211049779. The reversal of 211049749 is 947940112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209004849 + 2044900 = 14457^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 211049749 - 2⁷ = 211049621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211049779) 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, 105524874 + 105524875.

It is an arithmetic number, because the mean of its divisors is an integer number (105524875).

Almost surely, 2^211049749 is an apocalyptic number.

It is an amenable number.

211049749 is a deficient number, since it is larger than the sum of its proper divisors (1).

211049749 is an equidigital number, since it uses as much as digits as its factorization.

211049749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 211049749 is about 14527.5513766085. The cubic root of 211049749 is about 595.3809663894.

The spelling of 211049749 in words is "two hundred eleven million, forty-nine thousand, seven hundred forty-nine".