209130913 has 4 divisors (see below), whose sum is σ = 209701120. Its totient is φ = 208560708.

The previous prime is 209130907. The next prime is 209130917. The reversal of 209130913 is 319031902.

209130913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209130913 - 2¹⁷ = 208999841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209130917) 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, 284553 + ... + 285286.

It is an arithmetic number, because the mean of its divisors is an integer number (52425280).

Almost surely, 2^209130913 is an apocalyptic number.

It is an amenable number.

209130913 is a deficient number, since it is larger than the sum of its proper divisors (570207).

209130913 is an equidigital number, since it uses as much as digits as its factorization.

209130913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570206.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 209130913 is about 14461.3593067872. The cubic root of 209130913 is about 593.5710956025.

The spelling of 209130913 in words is "two hundred nine million, one hundred thirty thousand, nine hundred thirteen".