673406 has 4 divisors (see below), whose sum is σ = 1010112. Its totient is φ = 336702.

The previous prime is 673403. The next prime is 673411. The reversal of 673406 is 604376.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673403) 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, 168350 + ... + 168353.

It is an arithmetic number, because the mean of its divisors is an integer number (252528).

2⁶⁷³⁴⁰⁶ is an apocalyptic number.

673406 is a deficient number, since it is larger than the sum of its proper divisors (336706).

673406 is a wasteful number, since it uses less digits than its factorization.

673406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336705.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 673406 is about 820.6131853681. The cubic root of 673406 is about 87.6514275840.

Subtracting from 673406 its sum of digits (26), we obtain a triangular number (673380 = T₁₁₆₀).

The spelling of 673406 in words is "six hundred seventy-three thousand, four hundred six".