7327442721 has 8 divisors (see below), whose sum is σ = 9776009664. Its totient is φ = 4881918800.

The previous prime is 7327442719. The next prime is 7327442753. The reversal of 7327442721 is 1272447237.

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 7327442721 - 2¹ = 7327442719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7327442721.

It is not an unprimeable number, because it can be changed into a prime (7327442021) 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, 755130 + ... + 764771.

It is an arithmetic number, because the mean of its divisors is an integer number (1222001208).

Almost surely, 2^7327442721 is an apocalyptic number.

It is an amenable number.

7327442721 is a deficient number, since it is larger than the sum of its proper divisors (2448566943).

7327442721 is a wasteful number, since it uses less digits than its factorization.

7327442721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521511.

The product of its digits is 131712, while the sum is 39.

The square root of 7327442721 is about 85600.4831820475. The cubic root of 7327442721 is about 1942.3052202709.

Adding to 7327442721 its reverse (1272447237), we get a palindrome (8599889958).

The spelling of 7327442721 in words is "seven billion, three hundred twenty-seven million, four hundred forty-two thousand, seven hundred twenty-one".