209066885 has 8 divisors (see below), whose sum is σ = 251091456. Its totient is φ = 167112720.

The previous prime is 209066863. The next prime is 209066911. The reversal of 209066885 is 588660902.

It is a happy number.

209066885 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 209066885 - 2¹⁰ = 209065861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10829 + ... + 23138.

It is an arithmetic number, because the mean of its divisors is an integer number (31386432).

Almost surely, 2^209066885 is an apocalyptic number.

It is an amenable number.

209066885 is a deficient number, since it is larger than the sum of its proper divisors (42024571).

209066885 is a wasteful number, since it uses less digits than its factorization.

209066885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35203.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 209066885 is about 14459.1453758512. The cubic root of 209066885 is about 593.5105130567.

The spelling of 209066885 in words is "two hundred nine million, sixty-six thousand, eight hundred eighty-five".