673721593 has 2 divisors, whose sum is σ = 673721594. Its totient is φ = 673721592.

The previous prime is 673721537. The next prime is 673721617. The reversal of 673721593 is 395127376.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463239529 + 210482064 = 21523^2 + 14508^2 .

It is a cyclic number.

It is not a de Polignac number, because 673721593 - 2¹⁷ = 673590521 is a prime.

It is not a weakly prime, because it can be changed into another prime (673728593) 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 as a sum of consecutive naturals, namely, 336860796 + 336860797.

It is an arithmetic number, because the mean of its divisors is an integer number (336860797).

Almost surely, 2^673721593 is an apocalyptic number.

It is an amenable number.

673721593 is a deficient number, since it is larger than the sum of its proper divisors (1).

673721593 is an equidigital number, since it uses as much as digits as its factorization.

673721593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 43.

The square root of 673721593 is about 25956.1474991956. The cubic root of 673721593 is about 876.6511811485.

The spelling of 673721593 in words is "six hundred seventy-three million, seven hundred twenty-one thousand, five hundred ninety-three".