211919089 has 2 divisors, whose sum is σ = 211919090. Its totient is φ = 211919088.

The previous prime is 211919053. The next prime is 211919107. The reversal of 211919089 is 980919112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211266225 + 652864 = 14535^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 211919089 - 2¹⁵ = 211886321 is a prime.

It is not a weakly prime, because it can be changed into another prime (211919039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105959544 + 105959545.

It is an arithmetic number, because the mean of its divisors is an integer number (105959545).

Almost surely, 2^211919089 is an apocalyptic number.

It is an amenable number.

211919089 is a deficient number, since it is larger than the sum of its proper divisors (1).

211919089 is an equidigital number, since it uses as much as digits as its factorization.

211919089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 211919089 is about 14557.4410182559. The cubic root of 211919089 is about 596.1973291085.

The spelling of 211919089 in words is "two hundred eleven million, nine hundred nineteen thousand, eighty-nine".