211072649 has 2 divisors, whose sum is σ = 211072650. Its totient is φ = 211072648.

The previous prime is 211072639. The next prime is 211072657. The reversal of 211072649 is 946270112.

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., 210250000 + 822649 = 14500^2 + 907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211072649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211072639) 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, 105536324 + 105536325.

It is an arithmetic number, because the mean of its divisors is an integer number (105536325).

Almost surely, 2^211072649 is an apocalyptic number.

It is an amenable number.

211072649 is a deficient number, since it is larger than the sum of its proper divisors (1).

211072649 is an equidigital number, since it uses as much as digits as its factorization.

211072649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 211072649 is about 14528.3395128280. The cubic root of 211072649 is about 595.4024995920.

The spelling of 211072649 in words is "two hundred eleven million, seventy-two thousand, six hundred forty-nine".