8073509 has 4 divisors (see below), whose sum is σ = 8097804. Its totient is φ = 8049216.

The previous prime is 8073503. The next prime is 8073523. The reversal of 8073509 is 9053708.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4452100 + 3621409 = 2110^2 + 1903^2 .

It is a cyclic number.

It is not a de Polignac number, because 8073509 - 2²⁰ = 7024933 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 (8073503) 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, 11642 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (2024451).

Almost surely, 2^8073509 is an apocalyptic number.

It is an amenable number.

8073509 is a deficient number, since it is larger than the sum of its proper divisors (24295).

8073509 is a wasteful number, since it uses less digits than its factorization.

8073509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24294.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 8073509 is about 2841.3920883961. The cubic root of 8073509 is about 200.6107082789.

The spelling of 8073509 in words is "eight million, seventy-three thousand, five hundred nine".