8045309 has 4 divisors (see below), whose sum is σ = 8061216. Its totient is φ = 8029404.

The previous prime is 8045287. The next prime is 8045321. The reversal of 8045309 is 9035408.

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 a cyclic number.

It is not a de Polignac number, because 8045309 - 2⁸ = 8045053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8045329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7169 + ... + 8214.

It is an arithmetic number, because the mean of its divisors is an integer number (2015304).

Almost surely, 2^8045309 is an apocalyptic number.

It is an amenable number.

8045309 is a deficient number, since it is larger than the sum of its proper divisors (15907).

8045309 is a wasteful number, since it uses less digits than its factorization.

8045309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15906.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 8045309 is about 2836.4253912275. The cubic root of 8045309 is about 200.3768644200.

Subtracting 8045309 from its reverse (9035408), we obtain a palindrome (990099).

The spelling of 8045309 in words is "eight million, forty-five thousand, three hundred nine".