209000011 has 8 divisors (see below), whose sum is σ = 237913344. Its totient is φ = 181738920.

The previous prime is 208999993. The next prime is 209000017. The reversal of 209000011 is 110000902.

209000011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 209000011 - 2⁷ = 208999883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208999955 and 209000000.

It is not an unprimeable number, because it can be changed into a prime (209000017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412791 + ... + 413296.

It is an arithmetic number, because the mean of its divisors is an integer number (29739168).

Almost surely, 2^209000011 is an apocalyptic number.

209000011 is a deficient number, since it is larger than the sum of its proper divisors (28913333).

209000011 is a wasteful number, since it uses less digits than its factorization.

209000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826121.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 209000011 is about 14456.8326752439. The cubic root of 209000011 is about 593.4472244513.

Adding to 209000011 its reverse (110000902), we get a palindrome (319000913).

The spelling of 209000011 in words is "two hundred nine million, eleven", and thus it is an aban number.