8130409 has 4 divisors (see below), whose sum is σ = 9291904. Its totient is φ = 6968916.

The previous prime is 8130391. The next prime is 8130427. The reversal of 8130409 is 9040318.

8130409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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.

It is an interprime number because it is at equal distance from previous prime (8130391) and next prime (8130427).

It is a cyclic number.

It is not a de Polignac number, because 8130409 - 2¹⁹ = 7606121 is a prime.

It is a super-2 number, since 2×8130409² = 132207101014562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8130439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580737 + ... + 580750.

It is an arithmetic number, because the mean of its divisors is an integer number (2322976).

Almost surely, 2^8130409 is an apocalyptic number.

It is an amenable number.

8130409 is a deficient number, since it is larger than the sum of its proper divisors (1161495).

8130409 is a wasteful number, since it uses less digits than its factorization.

8130409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161494.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 8130409 is about 2851.3872062559. The cubic root of 8130409 is about 201.0808895322.

Subtracting 8130409 from its reverse (9040318), we obtain a palindrome (909909).

The spelling of 8130409 in words is "eight million, one hundred thirty thousand, four hundred nine".