673891 has 2 divisors, whose sum is σ = 673892. Its totient is φ = 673890.

The previous prime is 673879. The next prime is 673921. The reversal of 673891 is 198376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673891 - 2¹⁹ = 149603 is a prime.

It is not a weakly prime, because it can be changed into another prime (673801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336945 + 336946.

It is an arithmetic number, because the mean of its divisors is an integer number (336946).

2⁶⁷³⁸⁹¹ is an apocalyptic number.

673891 is a deficient number, since it is larger than the sum of its proper divisors (1).

673891 is an equidigital number, since it uses as much as digits as its factorization.

673891 is an evil number, because the sum of its binary digits is even.

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

The square root of 673891 is about 820.9086429074. The cubic root of 673891 is about 87.6724652843.

The spelling of 673891 in words is "six hundred seventy-three thousand, eight hundred ninety-one".