673049106721 has 4 divisors (see below), whose sum is σ = 682268957572. Its totient is φ = 663829255872.

The previous prime is 673049106707. The next prime is 673049106731. The reversal of 673049106721 is 127601940376.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171627918400 + 501421188321 = 414280^2 + 708111^2 .

It is a cyclic number.

It is not a de Polignac number, because 673049106721 - 2¹³ = 673049098529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673049106731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4609925316 + ... + 4609925461.

It is an arithmetic number, because the mean of its divisors is an integer number (170567239393).

Almost surely, 2^673049106721 is an apocalyptic number.

It is an amenable number.

673049106721 is a deficient number, since it is larger than the sum of its proper divisors (9219850851).

673049106721 is an equidigital number, since it uses as much as digits as its factorization.

673049106721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219850850.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 673049106721 in words is "six hundred seventy-three billion, forty-nine million, one hundred six thousand, seven hundred twenty-one".