5173946721 has 12 divisors (see below), whose sum is σ = 7514770900. Its totient is φ = 3430239840.

The previous prime is 5173946671. The next prime is 5173946741. The reversal of 5173946721 is 1276493715.

It can be written as a sum of positive squares in 2 ways, for example, as 2786256225 + 2387690496 = 52785^2 + 48864^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5173946721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5173946741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1586446 + ... + 1589703.

Almost surely, 2^5173946721 is an apocalyptic number.

It is an amenable number.

5173946721 is a deficient number, since it is larger than the sum of its proper divisors (2340824179).

5173946721 is a wasteful number, since it uses less digits than its factorization.

5173946721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176336 (or 3176333 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 5173946721 is about 71930.1516820311. The cubic root of 5173946721 is about 1729.5799843507.

The spelling of 5173946721 in words is "five billion, one hundred seventy-three million, nine hundred forty-six thousand, seven hundred twenty-one".