671673 has 8 divisors (see below), whose sum is σ = 908128. Its totient is φ = 441504.

The previous prime is 671651. The next prime is 671681. The reversal of 671673 is 376176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671673 - 2⁶ = 671609 is a prime.

It is a super-2 number, since 2×671673² = 902289237858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671673.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1315 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (113516).

2⁶⁷¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

671673 is a deficient number, since it is larger than the sum of its proper divisors (236455).

671673 is a wasteful number, since it uses less digits than its factorization.

671673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143.

The product of its digits is 5292, while the sum is 30.

The square root of 671673 is about 819.5565874301. The cubic root of 671673 is about 87.5761731240.

The spelling of 671673 in words is "six hundred seventy-one thousand, six hundred seventy-three".