673385 has 4 divisors (see below), whose sum is σ = 808068. Its totient is φ = 538704.

The previous prime is 673381. The next prime is 673391. The reversal of 673385 is 583376.

It is a happy number.

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 430336 + 243049 = 656^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 673385 - 2² = 673381 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 (673381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67334 + ... + 67343.

It is an arithmetic number, because the mean of its divisors is an integer number (202017).

2⁶⁷³³⁸⁵ is an apocalyptic number.

It is an amenable number.

673385 is a deficient number, since it is larger than the sum of its proper divisors (134683).

673385 is a wasteful number, since it uses less digits than its factorization.

673385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134682.

The product of its digits is 15120, while the sum is 32.

The square root of 673385 is about 820.6003899585. The cubic root of 673385 is about 87.6505164452.

Subtracting from 673385 its reverse (583376), we obtain a palindrome (90009).

The spelling of 673385 in words is "six hundred seventy-three thousand, three hundred eighty-five".