671853 has 32 divisors (see below), whose sum is σ = 1161216. Its totient is φ = 335808.

The previous prime is 671851. The next prime is 671887. The reversal of 671853 is 358176.

It is not a de Polignac number, because 671853 - 2¹ = 671851 is a prime.

It is an Ulam number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 671853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6226 + ... + 6332.

It is an arithmetic number, because the mean of its divisors is an integer number (36288).

2⁶⁷¹⁸⁵³ is an apocalyptic number.

It is an amenable number.

671853 is a deficient number, since it is larger than the sum of its proper divisors (489363).

671853 is a wasteful number, since it uses less digits than its factorization.

671853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153.

The product of its digits is 5040, while the sum is 30.

The square root of 671853 is about 819.6663955537. Note that the first 3 decimals coincide. The cubic root of 671853 is about 87.5839955333.

The spelling of 671853 in words is "six hundred seventy-one thousand, eight hundred fifty-three".