673663 has 4 divisors (see below), whose sum is σ = 676000. Its totient is φ = 671328.

The previous prime is 673649. The next prime is 673667. The reversal of 673663 is 366376.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673663 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 (673667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663 + ... + 1336.

It is an arithmetic number, because the mean of its divisors is an integer number (169000).

2⁶⁷³⁶⁶³ is an apocalyptic number.

673663 is a deficient number, since it is larger than the sum of its proper divisors (2337).

673663 is a wasteful number, since it uses less digits than its factorization.

673663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its digits is 13608, while the sum is 31.

The square root of 673663 is about 820.7697606515. The cubic root of 673663 is about 87.6625766540.

The spelling of 673663 in words is "six hundred seventy-three thousand, six hundred sixty-three".