671919 has 8 divisors (see below), whose sum is σ = 905520. Its totient is φ = 443136.

The previous prime is 671917. The next prime is 671921. The reversal of 671919 is 919176.

It is an interprime number because it is at equal distance from previous prime (671917) and next prime (671921).

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

It is not a de Polignac number, because 671919 - 2¹ = 671917 is a prime.

It is a super-3 number, since 3×671919³ = 910064178943333677, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 671919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (113190).

2⁶⁷¹⁹¹⁹ is an apocalyptic number.

671919 is a deficient number, since it is larger than the sum of its proper divisors (233601).

671919 is a wasteful number, since it uses less digits than its factorization.

671919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its digits is 3402, while the sum is 33.

The square root of 671919 is about 819.7066548467. The cubic root of 671919 is about 87.5868633999.

The spelling of 671919 in words is "six hundred seventy-one thousand, nine hundred nineteen".