675509 has 4 divisors (see below), whose sum is σ = 693804. Its totient is φ = 657216.

The previous prime is 675481. The next prime is 675511. The reversal of 675509 is 905576.

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 422500 + 253009 = 650^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 675509 - 2⁸ = 675253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 675509.

It is not an unprimeable number, because it can be changed into a prime (675539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9092 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (173451).

2⁶⁷⁵⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

675509 is a deficient number, since it is larger than the sum of its proper divisors (18295).

675509 is a wasteful number, since it uses less digits than its factorization.

675509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18294.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 675509 is about 821.8935454181. The cubic root of 675509 is about 87.7425758661.

The spelling of 675509 in words is "six hundred seventy-five thousand, five hundred nine".