7712321 has 2 divisors, whose sum is σ = 7712322. Its totient is φ = 7712320.

The previous prime is 7712297. The next prime is 7712323. The reversal of 7712321 is 1232177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5340721 + 2371600 = 2311^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 7712321 - 2¹⁴ = 7695937 is a prime.

Together with 7712323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7712323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3856160 + 3856161.

It is an arithmetic number, because the mean of its divisors is an integer number (3856161).

Almost surely, 2^7712321 is an apocalyptic number.

It is an amenable number.

7712321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7712321 is an equidigital number, since it uses as much as digits as its factorization.

7712321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 23.

The square root of 7712321 is about 2777.1065877996. The cubic root of 7712321 is about 197.5733509522.

Adding to 7712321 its reverse (1232177), we get a palindrome (8944498).

The spelling of 7712321 in words is "seven million, seven hundred twelve thousand, three hundred twenty-one".