671317 has 4 divisors (see below), whose sum is σ = 673036. Its totient is φ = 669600.

The previous prime is 671303. The next prime is 671323. The reversal of 671317 is 713176.

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 269361 + 401956 = 519^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 671317 - 2⁷ = 671189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671291 and 671300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671357) 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, 43 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (168259).

2⁶⁷¹³¹⁷ is an apocalyptic number.

It is an amenable number.

671317 is a deficient number, since it is larger than the sum of its proper divisors (1719).

671317 is a wasteful number, since it uses less digits than its factorization.

671317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

The product of its digits is 882, while the sum is 25.

The square root of 671317 is about 819.3393680277. The cubic root of 671317 is about 87.5606980206.

The spelling of 671317 in words is "six hundred seventy-one thousand, three hundred seventeen".