673605 has 12 divisors (see below), whose sum is σ = 1167660. Its totient is φ = 359232.

The previous prime is 673579. The next prime is 673609. The reversal of 673605 is 506376.

It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 599076 = 273^2 + 774^2 .

It is not a de Polignac number, because 673605 - 2⁵ = 673573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7440 + ... + 7529.

It is an arithmetic number, because the mean of its divisors is an integer number (97305).

2⁶⁷³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

673605 is a deficient number, since it is larger than the sum of its proper divisors (494055).

673605 is a wasteful number, since it uses less digits than its factorization.

673605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14980 (or 14977 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 673605 is about 820.7344272053. The cubic root of 673605 is about 87.6600607693.

The spelling of 673605 in words is "six hundred seventy-three thousand, six hundred five".