7321467721 has 8 divisors (see below), whose sum is σ = 7442932104. Its totient is φ = 7200049920.

The previous prime is 7321467667. The next prime is 7321467739. The reversal of 7321467721 is 1277641237.

It can be written as a sum of positive squares in 4 ways, for example, as 371911225 + 6949556496 = 19285^2 + 83364^2 .

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 7321467721 - 2²⁵ = 7287913289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7321467521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465441 + ... + 480913.

It is an arithmetic number, because the mean of its divisors is an integer number (930366513).

Almost surely, 2^7321467721 is an apocalyptic number.

It is an amenable number.

7321467721 is a deficient number, since it is larger than the sum of its proper divisors (121464383).

7321467721 is a wasteful number, since it uses less digits than its factorization.

7321467721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23291.

The product of its digits is 98784, while the sum is 40.

The square root of 7321467721 is about 85565.5755605021. The cubic root of 7321467721 is about 1941.7771401942. Note that the first 3 decimals are identical.

The spelling of 7321467721 in words is "seven billion, three hundred twenty-one million, four hundred sixty-seven thousand, seven hundred twenty-one".