675209 has 4 divisors (see below), whose sum is σ = 686340. Its totient is φ = 664080.

The previous prime is 675197. The next prime is 675221. The reversal of 675209 is 902576.

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

It is an interprime number because it is at equal distance from previous prime (675197) and next prime (675221).

It can be written as a sum of positive squares in 2 ways, for example, as 40000 + 635209 = 200^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 675209 - 2⁸ = 674953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675239) 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, 5474 + ... + 5595.

It is an arithmetic number, because the mean of its divisors is an integer number (171585).

2⁶⁷⁵²⁰⁹ is an apocalyptic number.

It is an amenable number.

675209 is a deficient number, since it is larger than the sum of its proper divisors (11131).

675209 is a wasteful number, since it uses less digits than its factorization.

675209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11130.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 675209 is about 821.7110197630. The cubic root of 675209 is about 87.7295848374.

The spelling of 675209 in words is "six hundred seventy-five thousand, two hundred nine".