211894349 has 2 divisors, whose sum is σ = 211894350. Its totient is φ = 211894348.

The previous prime is 211894343. The next prime is 211894351. The reversal of 211894349 is 943498112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 99640324 = 10595^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 211894349 - 2¹² = 211890253 is a prime.

Together with 211894351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211894343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105947174 + 105947175.

It is an arithmetic number, because the mean of its divisors is an integer number (105947175).

Almost surely, 2^211894349 is an apocalyptic number.

It is an amenable number.

211894349 is a deficient number, since it is larger than the sum of its proper divisors (1).

211894349 is an equidigital number, since it uses as much as digits as its factorization.

211894349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 211894349 is about 14556.5912561973. The cubic root of 211894349 is about 596.1741276498.

The spelling of 211894349 in words is "two hundred eleven million, eight hundred ninety-four thousand, three hundred forty-nine".