130809 has 8 divisors (see below), whose sum is σ = 199360. Its totient is φ = 74736.

The previous prime is 130807. The next prime is 130811. The reversal of 130809 is 908031.

It is an interprime number because it is at equal distance from previous prime (130807) and next prime (130811).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130809 - 2¹ = 130807 is a prime.

It is a super-2 number, since 2×130809² = 34221988962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6229 = 130809 / (1 + 3 + 0 + 8 + 0 + 9).

It is a Curzon number.

130809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (130807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3094 + ... + 3135.

It is an arithmetic number, because the mean of its divisors is an integer number (24920).

2¹³⁰⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

130809 is a deficient number, since it is larger than the sum of its proper divisors (68551).

130809 is an equidigital number, since it uses as much as digits as its factorization.

130809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6239.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 130809 is about 361.6752687149. The cubic root of 130809 is about 50.7628357771.

It can be divided in two parts, 130 and 809, that added together give a palindrome (939).

The spelling of 130809 in words is "one hundred thirty thousand, eight hundred nine".