673734689 has 2 divisors, whose sum is σ = 673734690. Its totient is φ = 673734688.

The previous prime is 673734683. The next prime is 673734697. The reversal of 673734689 is 986437376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643484689 + 30250000 = 25367^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 673734689 - 2²⁸ = 405299233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673734689.

It is not a weakly prime, because it can be changed into another prime (673734683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336867344 + 336867345.

It is an arithmetic number, because the mean of its divisors is an integer number (336867345).

Almost surely, 2^673734689 is an apocalyptic number.

It is an amenable number.

673734689 is a deficient number, since it is larger than the sum of its proper divisors (1).

673734689 is an equidigital number, since it uses as much as digits as its factorization.

673734689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 53.

The square root of 673734689 is about 25956.3997696137. The cubic root of 673734689 is about 876.6568613135.

The spelling of 673734689 in words is "six hundred seventy-three million, seven hundred thirty-four thousand, six hundred eighty-nine".