673861 has 4 divisors (see below), whose sum is σ = 683424. Its totient is φ = 664300.

The previous prime is 673837. The next prime is 673879. The reversal of 673861 is 168376.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 673861 - 2⁹ = 673349 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673801) 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, 4675 + ... + 4816.

It is an arithmetic number, because the mean of its divisors is an integer number (170856).

2⁶⁷³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

673861 is a deficient number, since it is larger than the sum of its proper divisors (9563).

673861 is an equidigital number, since it uses as much as digits as its factorization.

673861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9562.

The product of its digits is 6048, while the sum is 31.

The square root of 673861 is about 820.8903702688. The cubic root of 673861 is about 87.6711642762.

The spelling of 673861 in words is "six hundred seventy-three thousand, eight hundred sixty-one".