8086509 has 18 divisors (see below), whose sum is σ = 12412010. Its totient is φ = 5072256.

The previous prime is 8086489. The next prime is 8086513. The reversal of 8086509 is 9056808.

It can be written as a sum of positive squares in 3 ways, for example, as 1946025 + 6140484 = 1395^2 + 2478^2 .

It is not a de Polignac number, because 8086509 - 2¹⁹ = 7562221 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 (8086549) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1047 + ... + 4155.

Almost surely, 2^8086509 is an apocalyptic number.

It is an amenable number.

8086509 is a deficient number, since it is larger than the sum of its proper divisors (4325501).

8086509 is a wasteful number, since it uses less digits than its factorization.

8086509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149 (or 3129 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 8086509 is about 2843.6787793279. The cubic root of 8086509 is about 200.7183252885.

Subtracting 8086509 from its reverse (9056808), we obtain a cube (970299 = 99³).

The spelling of 8086509 in words is "eight million, eighty-six thousand, five hundred nine".