671847 has 8 divisors (see below), whose sum is σ = 977280. Its totient is φ = 407160.

The previous prime is 671837. The next prime is 671851. The reversal of 671847 is 748176.

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

It is not a de Polignac number, because 671847 - 2⁴ = 671831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20359 = 671847 / (6 + 7 + 1 + 8 + 4 + 7).

671847 is a lucky number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671837) 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, 10147 + ... + 10212.

It is an arithmetic number, because the mean of its divisors is an integer number (122160).

2⁶⁷¹⁸⁴⁷ is an apocalyptic number.

671847 is a deficient number, since it is larger than the sum of its proper divisors (305433).

671847 is a wasteful number, since it uses less digits than its factorization.

671847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20373.

The product of its digits is 9408, while the sum is 33.

The square root of 671847 is about 819.6627355199. The cubic root of 671847 is about 87.5837348088.

The spelling of 671847 in words is "six hundred seventy-one thousand, eight hundred forty-seven".