673445441 has 2 divisors, whose sum is σ = 673445442. Its totient is φ = 673445440.

The previous prime is 673445419. The next prime is 673445471. The reversal of 673445441 is 144544376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651729841 + 21715600 = 25529^2 + 4660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673445441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 673445395 and 673445404.

It is not a weakly prime, because it can be changed into another prime (673445471) 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, 336722720 + 336722721.

It is an arithmetic number, because the mean of its divisors is an integer number (336722721).

Almost surely, 2^673445441 is an apocalyptic number.

It is an amenable number.

673445441 is a deficient number, since it is larger than the sum of its proper divisors (1).

673445441 is an equidigital number, since it uses as much as digits as its factorization.

673445441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 38.

The square root of 673445441 is about 25950.8273663866. The cubic root of 673445441 is about 876.5313878176.

The spelling of 673445441 in words is "six hundred seventy-three million, four hundred forty-five thousand, four hundred forty-one".