673438339737 has 10 divisors (see below), whose sum is σ = 1006000482938. Its totient is φ = 448958893104.

The previous prime is 673438339709. The next prime is 673438339747. The reversal of 673438339737 is 737933834376.

It can be written as a sum of positive squares in only one way, i.e., 512056167561 + 161382172176 = 715581^2 + 401724^2 .

It is not a de Polignac number, because 673438339737 - 2¹² = 673438335641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673438339747) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4157026708 + ... + 4157026869.

Almost surely, 2^673438339737 is an apocalyptic number.

It is an amenable number.

673438339737 is a deficient number, since it is larger than the sum of its proper divisors (332562143201).

673438339737 is an equidigital number, since it uses as much as digits as its factorization.

673438339737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8314053589 (or 8314053580 counting only the distinct ones).

The product of its digits is 144027072, while the sum is 63.

The spelling of 673438339737 in words is "six hundred seventy-three billion, four hundred thirty-eight million, three hundred thirty-nine thousand, seven hundred thirty-seven".