8132809 has 4 divisors (see below), whose sum is σ = 8141716. Its totient is φ = 8123904.

The previous prime is 8132759. The next prime is 8132843. The reversal of 8132809 is 9082318.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4020025 + 4112784 = 2005^2 + 2028^2 .

It is a cyclic number.

It is not a de Polignac number, because 8132809 - 2¹¹ = 8130761 is a prime.

It is a super-2 number, since 2×8132809² = 132285164460962, which contains 22 as substring.

It is a Duffinian number.

8132809 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8132849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2904 + ... + 4969.

It is an arithmetic number, because the mean of its divisors is an integer number (2035429).

Almost surely, 2^8132809 is an apocalyptic number.

It is an amenable number.

8132809 is a deficient number, since it is larger than the sum of its proper divisors (8907).

8132809 is a wasteful number, since it uses less digits than its factorization.

8132809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8906.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 8132809 is about 2851.8080229917. The cubic root of 8132809 is about 201.1006731477.

The spelling of 8132809 in words is "eight million, one hundred thirty-two thousand, eight hundred nine".