673888489 has 2 divisors, whose sum is σ = 673888490. Its totient is φ = 673888488.

The previous prime is 673888471. The next prime is 673888513. The reversal of 673888489 is 984888376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542098089 + 131790400 = 23283^2 + 11480^2 .

It is a cyclic number.

It is not a de Polignac number, because 673888489 - 2⁷ = 673888361 is a prime.

It is not a weakly prime, because it can be changed into another prime (673888469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336944244 + 336944245.

It is an arithmetic number, because the mean of its divisors is an integer number (336944245).

Almost surely, 2^673888489 is an apocalyptic number.

It is an amenable number.

673888489 is a deficient number, since it is larger than the sum of its proper divisors (1).

673888489 is an equidigital number, since it uses as much as digits as its factorization.

673888489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 61.

The square root of 673888489 is about 25959.3622610418. The cubic root of 673888489 is about 876.7235639137.

The spelling of 673888489 in words is "six hundred seventy-three million, eight hundred eighty-eight thousand, four hundred eighty-nine".