211208089 has 3 divisors (see below), whose sum is σ = 211222623. Its totient is φ = 211193556.

The previous prime is 211208087. The next prime is 211208093. The reversal of 211208089 is 980802112.

It is a happy number.

The square root of 211208089 is 14533.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 121110025 + 90098064 = 11005^2 + 9492^2 .

It is not a de Polignac number, because 211208089 - 2¹ = 211208087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211208089.

It is not an unprimeable number, because it can be changed into a prime (211208087) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7267 + ... + 21799.

It is an arithmetic number, because the mean of its divisors is an integer number (70407541).

Almost surely, 2^211208089 is an apocalyptic number.

211208089 is the 14533-rd square number.

211208089 is the 7267-th centered octagonal number.

It is an amenable number.

211208089 is a deficient number, since it is larger than the sum of its proper divisors (14534).

211208089 is an frugal number, since it uses more digits than its factorization.

211208089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29066 (or 14533 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The cubic root of 211208089 is about 595.5298239558.

Multiplying 211208089 by its product of nonzero digits (2304), we get a square (486623437056 = 697584²).

The spelling of 211208089 in words is "two hundred eleven million, two hundred eight thousand, eighty-nine".