671893 has 2 divisors, whose sum is σ = 671894. Its totient is φ = 671892.

The previous prime is 671887. The next prime is 671903. The reversal of 671893 is 398176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439569 + 232324 = 663^2 + 482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671093) 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 as a sum of consecutive naturals, namely, 335946 + 335947.

It is an arithmetic number, because the mean of its divisors is an integer number (335947).

2⁶⁷¹⁸⁹³ is an apocalyptic number.

It is an amenable number.

671893 is a deficient number, since it is larger than the sum of its proper divisors (1).

671893 is an equidigital number, since it uses as much as digits as its factorization.

671893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 671893 is about 819.6907953613. The cubic root of 671893 is about 87.5857336567.

The spelling of 671893 in words is "six hundred seventy-one thousand, eight hundred ninety-three".