673789 has 4 divisors (see below), whose sum is σ = 686556. Its totient is φ = 661024.

The previous prime is 673787. The next prime is 673793. The reversal of 673789 is 987376.

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

It can be written as a sum of positive squares in 2 ways, for example, as 574564 + 99225 = 758^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 673789 - 2¹ = 673787 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673781) 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, 6304 + ... + 6409.

It is an arithmetic number, because the mean of its divisors is an integer number (171639).

2⁶⁷³⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

673789 is a deficient number, since it is larger than the sum of its proper divisors (12767).

673789 is a wasteful number, since it uses less digits than its factorization.

673789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12766.

The product of its digits is 63504, while the sum is 40.

The square root of 673789 is about 820.8465142766. The cubic root of 673789 is about 87.6680416991.

The spelling of 673789 in words is "six hundred seventy-three thousand, seven hundred eighty-nine".