8130809 has 2 divisors, whose sum is σ = 8130810. Its totient is φ = 8130808.

The previous prime is 8130797. The next prime is 8130821. The reversal of 8130809 is 9080318.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (8130797) and next prime (8130821).

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 133225 = 2828^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 8130809 - 2⁸ = 8130553 is a prime.

It is a super-2 number, since 2×8130809² = 132220109988962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8130839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4065404 + 4065405.

It is an arithmetic number, because the mean of its divisors is an integer number (4065405).

Almost surely, 2^8130809 is an apocalyptic number.

It is an amenable number.

8130809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8130809 is an equidigital number, since it uses as much as digits as its factorization.

8130809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 8130809 is about 2851.4573466913. The cubic root of 8130809 is about 201.0841870718.

The spelling of 8130809 in words is "eight million, one hundred thirty thousand, eight hundred nine".