673729 has 8 divisors (see below), whose sum is σ = 777920. Its totient is φ = 571536.

The previous prime is 673669. The next prime is 673747. The reversal of 673729 is 927376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 673729 - 2¹¹ = 671681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673694 and 673703.

It is not an unprimeable number, because it can be changed into a prime (673769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (97240).

2⁶⁷³⁷²⁹ is an apocalyptic number.

It is an amenable number.

673729 is a deficient number, since it is larger than the sum of its proper divisors (104191).

673729 is a wasteful number, since it uses less digits than its factorization.

673729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its digits is 15876, while the sum is 34.

The square root of 673729 is about 820.8099658264. The cubic root of 673729 is about 87.6654393817.

The spelling of 673729 in words is "six hundred seventy-three thousand, seven hundred twenty-nine".