673813 has 4 divisors (see below), whose sum is σ = 770080. Its totient is φ = 577548.

The previous prime is 673811. The next prime is 673817. The reversal of 673813 is 318376.

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 673813 - 2¹ = 673811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673811) 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, 48123 + ... + 48136.

It is an arithmetic number, because the mean of its divisors is an integer number (192520).

2⁶⁷³⁸¹³ is an apocalyptic number.

It is an amenable number.

673813 is a deficient number, since it is larger than the sum of its proper divisors (96267).

673813 is an equidigital number, since it uses as much as digits as its factorization.

673813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96266.

The product of its digits is 3024, while the sum is 28.

The square root of 673813 is about 820.8611332010. The cubic root of 673813 is about 87.6690825828.

The spelling of 673813 in words is "six hundred seventy-three thousand, eight hundred thirteen".