673438339709 has 2 divisors, whose sum is σ = 673438339710. Its totient is φ = 673438339708.

The previous prime is 673438339687. The next prime is 673438339747. The reversal of 673438339709 is 907933834376.

673438339709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422081503684 + 251356836025 = 649678^2 + 501355^2 .

It is a cyclic number.

It is not a de Polignac number, because 673438339709 - 2²⁰ = 673437291133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673438338709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336719169854 + 336719169855.

It is an arithmetic number, because the mean of its divisors is an integer number (336719169855).

Almost surely, 2^673438339709 is an apocalyptic number.

It is an amenable number.

673438339709 is a deficient number, since it is larger than the sum of its proper divisors (1).

673438339709 is an equidigital number, since it uses as much as digits as its factorization.

673438339709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61725888, while the sum is 62.

The spelling of 673438339709 in words is "six hundred seventy-three billion, four hundred thirty-eight million, three hundred thirty-nine thousand, seven hundred nine".