673687 has 8 divisors (see below), whose sum is σ = 776096. Its totient is φ = 572832.

The previous prime is 673669. The next prime is 673747. The reversal of 673687 is 786376.

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

It is a cyclic number.

It is not a de Polignac number, because 673687 - 2¹⁵ = 640919 is a prime.

It is a super-4 number, since 4×673687⁴ (a number of 24 digits) contains 4444 as substring.

It is a d-powerful number, because it can be written as 6 + 7⁵ + 6⁵ + 3¹² + 8 + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (97012).

2⁶⁷³⁶⁸⁷ is an apocalyptic number.

673687 is a deficient number, since it is larger than the sum of its proper divisors (102409).

673687 is a wasteful number, since it uses less digits than its factorization.

673687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its digits is 42336, while the sum is 37.

The square root of 673687 is about 820.7843809430. The cubic root of 673687 is about 87.6636176675.

The spelling of 673687 in words is "six hundred seventy-three thousand, six hundred eighty-seven".