673333321 has 2 divisors, whose sum is σ = 673333322. Its totient is φ = 673333320.

The previous prime is 673333313. The next prime is 673333337. The reversal of 673333321 is 123333376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602015296 + 71318025 = 24536^2 + 8445^2 .

It is a cyclic number.

It is not a de Polignac number, because 673333321 - 2³ = 673333313 is a prime.

It is a super-2 number, since 2×673333321² = 906755522337778082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (673333391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336666660 + 336666661.

It is an arithmetic number, because the mean of its divisors is an integer number (336666661).

Almost surely, 2^673333321 is an apocalyptic number.

It is an amenable number.

673333321 is a deficient number, since it is larger than the sum of its proper divisors (1).

673333321 is an equidigital number, since it uses as much as digits as its factorization.

673333321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 31.

The square root of 673333321 is about 25948.6670370561. The cubic root of 673333321 is about 876.4827413855.

Adding to 673333321 its reverse (123333376), we get a palindrome (796666697).

Subtracting from 673333321 its reverse (123333376), we obtain a palindrome (549999945).

The spelling of 673333321 in words is "six hundred seventy-three million, three hundred thirty-three thousand, three hundred twenty-one".