8130509 has 2 divisors, whose sum is σ = 8130510. Its totient is φ = 8130508.

The previous prime is 8130449. The next prime is 8130547. The reversal of 8130509 is 9050318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5189284 + 2941225 = 2278^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 8130509 - 2²⁰ = 7081933 is a prime.

It is a super-2 number, since 2×8130509² = 132210353198162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8130589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065254 + 4065255.

It is an arithmetic number, because the mean of its divisors is an integer number (4065255).

Almost surely, 2^8130509 is an apocalyptic number.

It is an amenable number.

8130509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8130509 is an equidigital number, since it uses as much as digits as its factorization.

8130509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 8130509 is about 2851.4047415265. The cubic root of 8130509 is about 201.0817139272.

The spelling of 8130509 in words is "eight million, one hundred thirty thousand, five hundred nine".