671696 has 10 divisors (see below), whose sum is σ = 1301442. Its totient is φ = 335840.

The previous prime is 671681. The next prime is 671701. The reversal of 671696 is 696176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 287296 = 620^2 + 536^2 .

It is a plaindrome in base 9.

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 671696.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20975 + ... + 21006.

2⁶⁷¹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

671696 is a deficient number, since it is larger than the sum of its proper divisors (629746).

671696 is a wasteful number, since it uses less digits than its factorization.

671696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41989 (or 41983 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 671696 is about 819.5706192879. The cubic root of 671696 is about 87.5771727320.

The spelling of 671696 in words is "six hundred seventy-one thousand, six hundred ninety-six".