673421500 has 24 divisors (see below), whose sum is σ = 1470753648. Its totient is φ = 269368400.

The previous prime is 673421491. The next prime is 673421521. The reversal of 673421500 is 5124376.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 672922 + ... + 673921.

It is an arithmetic number, because the mean of its divisors is an integer number (61281402).

Almost surely, 2^673421500 is an apocalyptic number.

It is an amenable number.

673421500 is an abundant number, since it is smaller than the sum of its proper divisors (797332148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673421500 is a wasteful number, since it uses less digits than its factorization.

673421500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346862 (or 1346850 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 673421500 is about 25950.3660860497. The cubic root of 673421500 is about 876.5210007912.

Adding to 673421500 its reverse (5124376), we get a palindrome (678545876).

The spelling of 673421500 in words is "six hundred seventy-three million, four hundred twenty-one thousand, five hundred".