130309 has 4 divisors (see below), whose sum is σ = 131040. Its totient is φ = 129580.

The previous prime is 130307. The next prime is 130337. The reversal of 130309 is 903031.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 903031 = 29 ⋅31139.

It is a cyclic number.

It is not a de Polignac number, because 130309 - 2¹ = 130307 is a prime.

It is a Duffinian number.

130309 is a lucky number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 130292 and 130301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130303) 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, 102 + ... + 520.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2¹³⁰³⁰⁹ is an apocalyptic number.

It is an amenable number.

130309 is a deficient number, since it is larger than the sum of its proper divisors (731).

130309 is an equidigital number, since it uses as much as digits as its factorization.

130309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 130309 is about 360.9833791188. The cubic root of 130309 is about 50.6980751318.

The spelling of 130309 in words is "one hundred thirty thousand, three hundred nine".