206328109 has 8 divisors (see below), whose sum is σ = 223443360.
Its totient is φ = 189390576.
The previous prime is 206328107. The next prime is 206328119. The reversal of 206328109 is 901823602.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 206328109 - 21 = 206328107 is a prime.
It is a house number.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (206328103) 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, 42007 + ... + 46660.
It is an arithmetic number, because the mean of its divisors is an integer number (27930420).
Almost surely, 2206328109 is an apocalyptic number.
It is an amenable number.
206328109 is a deficient number, since it is larger than the sum of its proper divisors (17115251).
206328109 is a wasteful number, since it uses less digits than its factorization.
206328109 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 88859.
The product of its (nonzero) digits is 5184, while the sum is 31.
The square root of 206328109 is about 14364.1257652528.
The cubic root of 206328109 is about 590.9074506528.
The spelling of 206328109 in words is "two hundred six million, three hundred twenty-eight thousand, one hundred nine".