673733421 has 12 divisors (see below), whose sum is σ = 973539840. Its totient is φ = 448985160.

The previous prime is 673733419. The next prime is 673733453. The reversal of 673733421 is 124337376.

It is not a de Polignac number, because 673733421 - 2¹ = 673733419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673733321) 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 11 ways as a sum of consecutive naturals, for example, 13716 + ... + 39186.

It is an arithmetic number, because the mean of its divisors is an integer number (81128320).

Almost surely, 2^673733421 is an apocalyptic number.

It is an amenable number.

673733421 is a deficient number, since it is larger than the sum of its proper divisors (299806419).

673733421 is a wasteful number, since it uses less digits than its factorization.

673733421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28416 (or 28413 counting only the distinct ones).

The product of its digits is 63504, while the sum is 36.

The square root of 673733421 is about 25956.3753440268. The cubic root of 673733421 is about 876.6563113435.

The spelling of 673733421 in words is "six hundred seventy-three million, seven hundred thirty-three thousand, four hundred twenty-one".