209064133 has 4 divisors (see below), whose sum is σ = 209234380. Its totient is φ = 208893888.

The previous prime is 209064109. The next prime is 209064139. The reversal of 209064133 is 331460902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122611329 + 86452804 = 11073^2 + 9298^2 .

It is a cyclic number.

It is not a de Polignac number, because 209064133 - 2⁵ = 209064101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209064139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83268 + ... + 85741.

It is an arithmetic number, because the mean of its divisors is an integer number (52308595).

Almost surely, 2^209064133 is an apocalyptic number.

It is an amenable number.

209064133 is a deficient number, since it is larger than the sum of its proper divisors (170247).

209064133 is a wasteful number, since it uses less digits than its factorization.

209064133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170246.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 209064133 is about 14459.0502108541. The cubic root of 209064133 is about 593.5079088692.

The spelling of 209064133 in words is "two hundred nine million, sixty-four thousand, one hundred thirty-three".