673646 has 4 divisors (see below), whose sum is σ = 1010472. Its totient is φ = 336822.

The previous prime is 673643. The next prime is 673649. The reversal of 673646 is 646376.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (673643) and next prime (673649).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 673646.

It is not an unprimeable number, because it can be changed into a prime (673643) 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 as a sum of consecutive naturals, namely, 168410 + ... + 168413.

It is an arithmetic number, because the mean of its divisors is an integer number (252618).

2⁶⁷³⁶⁴⁶ is an apocalyptic number.

673646 is a deficient number, since it is larger than the sum of its proper divisors (336826).

673646 is a wasteful number, since it uses less digits than its factorization.

673646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336825.

The product of its digits is 18144, while the sum is 32.

The square root of 673646 is about 820.7594044542. The cubic root of 673646 is about 87.6618392545.

The spelling of 673646 in words is "six hundred seventy-three thousand, six hundred forty-six".