727273447721 has 8 divisors (see below), whose sum is σ = 768359329920. Its totient is φ = 687254731408.

The previous prime is 727273447717. The next prime is 727273447723. The reversal of 727273447721 is 127744372727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 727273447721 - 2² = 727273447717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727273447723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266790071 + ... + 266792796.

It is an arithmetic number, because the mean of its divisors is an integer number (96044916240).

Almost surely, 2^727273447721 is an apocalyptic number.

It is an amenable number.

727273447721 is a deficient number, since it is larger than the sum of its proper divisors (41085882199).

727273447721 is a wasteful number, since it uses less digits than its factorization.

727273447721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533582943.

The product of its digits is 6453888, while the sum is 53.

The spelling of 727273447721 in words is "seven hundred twenty-seven billion, two hundred seventy-three million, four hundred forty-seven thousand, seven hundred twenty-one".