130686509 has 2 divisors, whose sum is σ = 130686510. Its totient is φ = 130686508.

The previous prime is 130686487. The next prime is 130686539. The reversal of 130686509 is 905686031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128754409 + 1932100 = 11347^2 + 1390^2 .

It is an emirp because it is prime and its reverse (905686031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130686509 - 2²⁴ = 113909293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130686539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65343254 + 65343255.

It is an arithmetic number, because the mean of its divisors is an integer number (65343255).

Almost surely, 2^130686509 is an apocalyptic number.

It is an amenable number.

130686509 is a deficient number, since it is larger than the sum of its proper divisors (1).

130686509 is an equidigital number, since it uses as much as digits as its factorization.

130686509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 130686509 is about 11431.8200213264. The cubic root of 130686509 is about 507.4698586773.

The spelling of 130686509 in words is "one hundred thirty million, six hundred eighty-six thousand, five hundred nine".