673889 has 4 divisors (see below), whose sum is σ = 676356. Its totient is φ = 671424.

The previous prime is 673879. The next prime is 673891. The reversal of 673889 is 988376.

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 21025 + 652864 = 145^2 + 808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673889 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 (673879) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 764 + ... + 1389.

It is an arithmetic number, because the mean of its divisors is an integer number (169089).

2⁶⁷³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

673889 is a deficient number, since it is larger than the sum of its proper divisors (2467).

673889 is a wasteful number, since it uses less digits than its factorization.

673889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466.

The product of its digits is 72576, while the sum is 41.

The square root of 673889 is about 820.9074247441. The cubic root of 673889 is about 87.6723785516.

The spelling of 673889 in words is "six hundred seventy-three thousand, eight hundred eighty-nine".