675985 has 4 divisors (see below), whose sum is σ = 811188. Its totient is φ = 540784.

The previous prime is 675979. The next prime is 676007. The reversal of 675985 is 589576.

It is a happy number.

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 147456 + 528529 = 384^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 675985 - 2³ = 675977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67594 + ... + 67603.

It is an arithmetic number, because the mean of its divisors is an integer number (202797).

2⁶⁷⁵⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

675985 is a deficient number, since it is larger than the sum of its proper divisors (135203).

675985 is a wasteful number, since it uses less digits than its factorization.

675985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135202.

The product of its digits is 75600, while the sum is 40.

The square root of 675985 is about 822.1830696384. The cubic root of 675985 is about 87.7631804077.

The spelling of 675985 in words is "six hundred seventy-five thousand, nine hundred eighty-five".