671683 has 4 divisors (see below), whose sum is σ = 679320. Its totient is φ = 664048.

The previous prime is 671681. The next prime is 671701. The reversal of 671683 is 386176.

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

It is a cyclic number.

It is not a de Polignac number, because 671683 - 2¹ = 671681 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (671681) 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, 3685 + ... + 3862.

It is an arithmetic number, because the mean of its divisors is an integer number (169830).

2⁶⁷¹⁶⁸³ is an apocalyptic number.

671683 is a deficient number, since it is larger than the sum of its proper divisors (7637).

671683 is an equidigital number, since it uses as much as digits as its factorization.

671683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7636.

The product of its digits is 6048, while the sum is 31.

The square root of 671683 is about 819.5626882673. The cubic root of 671683 is about 87.5766077390.

The spelling of 671683 in words is "six hundred seventy-one thousand, six hundred eighty-three".