9520509 has 4 divisors (see below), whose sum is σ = 12694016. Its totient is φ = 6347004.

The previous prime is 9520481. The next prime is 9520523. The reversal of 9520509 is 9050259.

9520509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9050259 = 3 ⋅3016753.

It is not a de Polignac number, because 9520509 - 2⁵ = 9520477 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 (9520529) 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, 1586749 + ... + 1586754.

It is an arithmetic number, because the mean of its divisors is an integer number (3173504).

Almost surely, 2^9520509 is an apocalyptic number.

It is an amenable number.

9520509 is a deficient number, since it is larger than the sum of its proper divisors (3173507).

9520509 is a wasteful number, since it uses less digits than its factorization.

9520509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173506.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 9520509 is about 3085.5322069296. The cubic root of 9520509 is about 211.9434775743.

The spelling of 9520509 in words is "nine million, five hundred twenty thousand, five hundred nine".