7320396721 has 8 divisors (see below), whose sum is σ = 8046849888. Its totient is φ = 6604104000.

The previous prime is 7320396697. The next prime is 7320396773. The reversal of 7320396721 is 1276930237.

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 7320396721 - 2¹¹ = 7320394673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7320396791) 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, 2538600 + ... + 2541481.

It is an arithmetic number, because the mean of its divisors is an integer number (1005856236).

Almost surely, 2^7320396721 is an apocalyptic number.

It is an amenable number.

7320396721 is a deficient number, since it is larger than the sum of its proper divisors (726453167).

7320396721 is a wasteful number, since it uses less digits than its factorization.

7320396721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080223.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 7320396721 is about 85559.3169736645. The cubic root of 7320396721 is about 1941.6824531356.

The spelling of 7320396721 in words is "seven billion, three hundred twenty million, three hundred ninety-six thousand, seven hundred twenty-one".