671894 has 8 divisors (see below), whose sum is σ = 1040448. Its totient is φ = 325080.

The previous prime is 671893. The next prime is 671903. The reversal of 671894 is 498176.

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

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 5480.

It is an arithmetic number, because the mean of its divisors is an integer number (130056).

2⁶⁷¹⁸⁹⁴ is an apocalyptic number.

671894 is a deficient number, since it is larger than the sum of its proper divisors (368554).

671894 is a wasteful number, since it uses less digits than its factorization.

671894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10870.

The product of its digits is 12096, while the sum is 35.

The square root of 671894 is about 819.6914053472. The cubic root of 671894 is about 87.5857771089.

The spelling of 671894 in words is "six hundred seventy-one thousand, eight hundred ninety-four".