673488209 has 2 divisors, whose sum is σ = 673488210. Its totient is φ = 673488208.

The previous prime is 673488197. The next prime is 673488229. The reversal of 673488209 is 902884376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602457025 + 71031184 = 24545^2 + 8428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673488209 is a prime.

It is not a weakly prime, because it can be changed into another prime (673488229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336744104 + 336744105.

It is an arithmetic number, because the mean of its divisors is an integer number (336744105).

Almost surely, 2^673488209 is an apocalyptic number.

It is an amenable number.

673488209 is a deficient number, since it is larger than the sum of its proper divisors (1).

673488209 is an equidigital number, since it uses as much as digits as its factorization.

673488209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 673488209 is about 25951.6513732749. The cubic root of 673488209 is about 876.5499425010.

It can be divided in two parts, 67348 and 8209, that added together give a palindrome (75557).

The spelling of 673488209 in words is "six hundred seventy-three million, four hundred eighty-eight thousand, two hundred nine".