130209 has 4 divisors (see below), whose sum is σ = 173616. Its totient is φ = 86804.

The previous prime is 130201. The next prime is 130211. The reversal of 130209 is 902031.

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 130209 - 2³ = 130201 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130201) 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, 21699 + ... + 21704.

It is an arithmetic number, because the mean of its divisors is an integer number (43404).

2¹³⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

130209 is a deficient number, since it is larger than the sum of its proper divisors (43407).

130209 is an equidigital number, since it uses as much as digits as its factorization.

130209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43406.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 130209 is about 360.8448420028. The cubic root of 130209 is about 50.6851031321.

The spelling of 130209 in words is "one hundred thirty thousand, two hundred nine".