673538 has 4 divisors (see below), whose sum is σ = 1010310. Its totient is φ = 336768.

The previous prime is 673529. The next prime is 673549. The reversal of 673538 is 835376.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 573049 + 100489 = 757^2 + 317^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168383 + ... + 168386.

2⁶⁷³⁵³⁸ is an apocalyptic number.

673538 is a deficient number, since it is larger than the sum of its proper divisors (336772).

673538 is a wasteful number, since it uses less digits than its factorization.

673538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336771.

The product of its digits is 15120, while the sum is 32.

The square root of 673538 is about 820.6936090893. The cubic root of 673538 is about 87.6571543088.

The spelling of 673538 in words is "six hundred seventy-three thousand, five hundred thirty-eight".