673705 has 4 divisors (see below), whose sum is σ = 808452. Its totient is φ = 538960.

The previous prime is 673669. The next prime is 673747. The reversal of 673705 is 507376.

673705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 597529 = 276^2 + 773^2 .

It is not a de Polignac number, because 673705 - 2⁹ = 673193 is a prime.

It is a Duffinian number.

673705 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67366 + ... + 67375.

It is an arithmetic number, because the mean of its divisors is an integer number (202113).

2⁶⁷³⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

673705 is a deficient number, since it is larger than the sum of its proper divisors (134747).

673705 is a wasteful number, since it uses less digits than its factorization.

673705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134746.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 673705 is about 820.7953459907. The cubic root of 673705 is about 87.6643984114.

It can be divided in two parts, 673 and 705, that added together give a triangular number (1378 = T₅₂).

The spelling of 673705 in words is "six hundred seventy-three thousand, seven hundred five".