8536509 has 10 divisors (see below), whose sum is σ = 12752190. Its totient is φ = 5690952.

The previous prime is 8536477. The next prime is 8536511. The reversal of 8536509 is 9056358.

It can be written as a sum of positive squares in only one way, i.e., 8139609 + 396900 = 2853^2 + 630^2 .

It is not a de Polignac number, because 8536509 - 2⁵ = 8536477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8536579) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 52614 + ... + 52775.

It is an arithmetic number, because the mean of its divisors is an integer number (1275219).

Almost surely, 2^8536509 is an apocalyptic number.

It is an amenable number.

8536509 is a deficient number, since it is larger than the sum of its proper divisors (4215681).

8536509 is a wasteful number, since it uses less digits than its factorization.

8536509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105401 (or 105392 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 8536509 is about 2921.7304803832. The cubic root of 8536509 is about 204.3745282373.

It can be divided in two parts, 8536 and 509, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 8536509 in words is "eight million, five hundred thirty-six thousand, five hundred nine".