673345 has 4 divisors (see below), whose sum is σ = 808020. Its totient is φ = 538672.

The previous prime is 673339. The next prime is 673349. The reversal of 673345 is 543376.

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 478864 + 194481 = 692^2 + 441^2 .

It is a cyclic number.

It is not a de Polignac number, because 673345 - 2⁵ = 673313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673349) 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, 67330 + ... + 67339.

It is an arithmetic number, because the mean of its divisors is an integer number (202005).

2⁶⁷³³⁴⁵ is an apocalyptic number.

It is an amenable number.

673345 is a deficient number, since it is larger than the sum of its proper divisors (134675).

673345 is a wasteful number, since it uses less digits than its factorization.

673345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134674.

The product of its digits is 7560, while the sum is 28.

The square root of 673345 is about 820.5760171977. The cubic root of 673345 is about 87.6487808902.

It can be divided in two parts, 67 and 3345, that multiplied together give a triangular number (224115 = T₆₆₉).

The spelling of 673345 in words is "six hundred seventy-three thousand, three hundred forty-five".