211089839 has 2 divisors, whose sum is σ = 211089840. Its totient is φ = 211089838.

The previous prime is 211089803. The next prime is 211089859. The reversal of 211089839 is 938980112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211089839 - 2²⁰ = 210041263 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211089796 and 211089805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211089859) 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, 105544919 + 105544920.

It is an arithmetic number, because the mean of its divisors is an integer number (105544920).

Almost surely, 2^211089839 is an apocalyptic number.

211089839 is a deficient number, since it is larger than the sum of its proper divisors (1).

211089839 is an equidigital number, since it uses as much as digits as its factorization.

211089839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 211089839 is about 14528.9311031473. The cubic root of 211089839 is about 595.4186625754.

The spelling of 211089839 in words is "two hundred eleven million, eighty-nine thousand, eight hundred thirty-nine".