673239 has 8 divisors (see below), whose sum is σ = 1025920. Its totient is φ = 384696.

The previous prime is 673223. The next prime is 673241. The reversal of 673239 is 932376.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 673239 - 2⁴ = 673223 is a prime.

It is a super-2 number, since 2×673239² = 906501502242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673039) 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 7 ways as a sum of consecutive naturals, for example, 16009 + ... + 16050.

It is an arithmetic number, because the mean of its divisors is an integer number (128240).

2⁶⁷³²³⁹ is an apocalyptic number.

673239 is a deficient number, since it is larger than the sum of its proper divisors (352681).

673239 is a wasteful number, since it uses less digits than its factorization.

673239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32069.

The product of its digits is 6804, while the sum is 30.

The square root of 673239 is about 820.5114258802. The cubic root of 673239 is about 87.6441813370.

Subtracting from 673239 its product of digits (6804), we obtain a triangular number (666435 = T₁₁₅₄).

The spelling of 673239 in words is "six hundred seventy-three thousand, two hundred thirty-nine".