209230109 has 16 divisors (see below), whose sum is σ = 240744960. Its totient is φ = 179838000.

The previous prime is 209230081. The next prime is 209230111. The reversal of 209230109 is 901032902.

209230109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209230109 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 (209230139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202424 + ... + 203454.

It is an arithmetic number, because the mean of its divisors is an integer number (15046560).

Almost surely, 2^209230109 is an apocalyptic number.

It is an amenable number.

209230109 is a deficient number, since it is larger than the sum of its proper divisors (31514851).

209230109 is a wasteful number, since it uses less digits than its factorization.

209230109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 209230109 is about 14464.7885916110. The cubic root of 209230109 is about 593.6649292856.

The spelling of 209230109 in words is "two hundred nine million, two hundred thirty thousand, one hundred nine".