673679 has 4 divisors (see below), whose sum is σ = 677976. Its totient is φ = 669384.

The previous prime is 673669. The next prime is 673747. The reversal of 673679 is 976376.

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-673679 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 (673609) 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 3 ways as a sum of consecutive naturals, for example, 1904 + ... + 2229.

It is an arithmetic number, because the mean of its divisors is an integer number (169494).

2⁶⁷³⁶⁷⁹ is an apocalyptic number.

673679 is a deficient number, since it is larger than the sum of its proper divisors (4297).

673679 is a wasteful number, since it uses less digits than its factorization.

673679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296.

The product of its digits is 47628, while the sum is 38.

The square root of 673679 is about 820.7795075415. The cubic root of 673679 is about 87.6632706657.

It can be divided in two parts, 67367 and 9, that added together give a palindrome (67376).

The spelling of 673679 in words is "six hundred seventy-three thousand, six hundred seventy-nine".