211086749 has 2 divisors, whose sum is σ = 211086750. Its totient is φ = 211086748.

The previous prime is 211086731. The next prime is 211086761. The reversal of 211086749 is 947680112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189062500 + 22024249 = 13750^2 + 4693^2 .

It is a cyclic number.

It is not a de Polignac number, because 211086749 - 2⁸ = 211086493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211086769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105543374 + 105543375.

It is an arithmetic number, because the mean of its divisors is an integer number (105543375).

Almost surely, 2^211086749 is an apocalyptic number.

It is an amenable number.

211086749 is a deficient number, since it is larger than the sum of its proper divisors (1).

211086749 is an equidigital number, since it uses as much as digits as its factorization.

211086749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 211086749 is about 14528.8247632078. The cubic root of 211086749 is about 595.4157572522.

The spelling of 211086749 in words is "two hundred eleven million, eighty-six thousand, seven hundred forty-nine".