130305209 has 4 divisors (see below), whose sum is σ = 130332816. Its totient is φ = 130277604.

The previous prime is 130305199. The next prime is 130305223. The reversal of 130305209 is 902503031.

It is a happy number.

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 130305209 - 2⁸ = 130304953 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130305239) 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, 4739 + ... + 16824.

It is an arithmetic number, because the mean of its divisors is an integer number (32583204).

Almost surely, 2^130305209 is an apocalyptic number.

It is an amenable number.

130305209 is a deficient number, since it is larger than the sum of its proper divisors (27607).

130305209 is an equidigital number, since it uses as much as digits as its factorization.

130305209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27606.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 130305209 is about 11415.1307044641. The cubic root of 130305209 is about 506.9758348432.

The spelling of 130305209 in words is "one hundred thirty million, three hundred five thousand, two hundred nine".